{"id":"CVE-2026-54874","aliases":["ALPINE-CVE-2026-54874","ALSA-2026:67154","ALSA-2026:67165","AZL-97668","AZL-97953","BELL-CVE-2026-54874","CLSA-2026-1788263953","CLSA-2026-1788264233","CLSA-2026-1788264701","CLSA-2026-1788264910","CLSA-2026-1788265101","CLSA-2026-1788271054","CLSA-2026-1788271692","CLSA-2026-1788271978","CLSA-2026-1788339545","CLSA-2026-1788856499","CLSA-2026-1788951485","CLSA-2026-1789551334","CLSA-2026-1789604584","CLSA-2026-1789605435","CLSA-2026-1789605650","CLSA-2026-1789631727","DEBIAN-CVE-2026-54874","EUVD-2026-65481","GHSA-97g4-hhwh-c697","MGASA-2026-0353","OESA-2026-3819","OESA-2026-3820","OESA-2026-3826","OESA-2026-3827","OESA-2026-3828","OESA-2026-3829","OESA-2026-3830","OESA-2026-3983","RHSA-2026:59635","RHSA-2026:59641","RHSA-2026:67154","RHSA-2026:67165","RLSA-2026:67154","RLSA-2026:67165","ROOT-OS-ALPINE-315-CVE-2026-54874","ROOT-OS-ALPINE-317-CVE-2026-54874","ROOT-OS-DEBIAN-11-CVE-2026-54874","ROOT-OS-DEBIAN-12-CVE-2026-54874","SUSE-SU-2026:23463-1","SUSE-SU-2026:23473-1","SUSE-SU-2026:23512-1","SUSE-SU-2026:23609-1","SUSE-SU-2026:3866-1","SUSE-SU-2026:3876-1","SUSE-SU-2026:3877-1","SUSE-SU-2026:3878-1","SUSE-SU-2026:4032-1","SUSE-SU-2026:4033-1","SUSE-SU-2026:4039-1","SUSE-SU-2026:4041-1","SUSE-SU-2026:4043-1","SUSE-SU-2026:4762-1","UBUNTU-CVE-2026-54874","USN-8678-1","USN-8678-2","USN-8865-1","openSUSE-SU-2026:11623-1","openSUSE-SU-2026:21744-1"],"status":"published","title":"Excessive Memory Use Buffering DTLS Records for a Future Epoch","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00622,"percentile":0.5009,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-405"],"published":"2026-08-25T00:00:00Z","modified":"2026-11-05T05:40:51Z","fixes":[{"ecosystem":"Alpine:v3.22","package":"openssl","fixed_in":["3.5.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"openssl","fixed_in":["3.5.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"openssl","fixed_in":["3.5.8-r0"],"sources":["osv"]},{"ecosystem":"Azure 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security/notices/USN-8678-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-8865-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-14456","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-14457","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-18798","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-63072","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-63073","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-63074","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-63075","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-63076","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-75803","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-2511","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-5535","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-54874","title":"Excessive Memory Use Buffering DTLS Records for a Future Epoch","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T12:59:17.912Z","modified":"2026-08-25T14:28:37.339Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-405"],"updated_at":"2026-11-02T13:38:09.774038Z"}],"euvd":[{"id":"EUVD-2026-65481","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T12:59:17Z","modified":"2026-08-25T14:28:37Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:32.944243Z"}],"ghsa":[{"id":"GHSA-97g4-hhwh-c697","title":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes...","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T15:32:58Z","modified":"2026-08-25T15:33:06Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-405"],"updated_at":"2026-11-02T15:10:57.434403Z"}],"nvd":[{"id":"CVE-2026-54874","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T13:19:24.033Z","modified":"2026-09-11T21:16:28.067Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-405"],"updated_at":"2026-11-02T14:12:41.347728Z"}],"osv":[{"id":"ALPINE-CVE-2026-54874","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T13:19:24.033Z","modified":"2026-10-01T02:17:49.345993561Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:50.764331Z"},{"id":"BELL-CVE-2026-54874","status":"published","published":"2026-08-26T15:49:50.470453Z","modified":"2026-08-29T07:15:07.676900685Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:24.657778Z"},{"id":"CVE-2026-54874","title":"Excessive Memory Use Buffering DTLS Records for a Future Epoch","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T12:59:17.912Z","modified":"2026-10-28T11:14:43.887116881Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-405"],"updated_at":"2026-11-02T15:45:10.818486Z"},{"id":"DEBIAN-CVE-2026-54874","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake is in progress causes OpenSSL to buffer far more memory than the record itself requires.  Impact summary: A peer can use a small amount of network traffic to make an OpenSSL DTLS endpoint retain a disproportionately large amount of memory, which may lead to a Denial of Service.  CWE: CWE-405: Asymmetric Resource Consumption (Amplification)  Description: While a DTLS handshake is in progress, a peer may legitimately have already moved on to the next epoch (for example, having sent its ChangeCipherSpec and Finished messages) before the local endpoint has processed the same transition, typically because of reordering on the underlying UDP transport. OpenSSL buffers such early records so that they can be processed once the local endpoint catches up.  Buffering a record currently retains the entire read buffer it arrived in, which is sized to hold the largest possible DTLS record (around 16 kilobytes), rather than just the bytes that make up the record itself. Up to 100 such records may be buffered per connection. As a result, a peer that sends a stream of small forged records claiming to belong to the next epoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of memory, despite sending only a small fraction of that amount of data over the network.  An attacker therefore gains a memory amplification factor of around 1200, and can multiply the effect across as many associations as it is able to open, making this a remote memory exhaustion Denial of Service risk for DTLS servers. Since the memory retained per connection remains bounded, and any limit an application already places on the number of concurrent associations also bounds the total exposure, this issue has been assessed as Low severity.  FIPS impact: no  No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary.  OpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.  OpenSSL 4.0 users should upgrade to OpenSSL 4.0.2. OpenSSL 3.6 users should upgrade to OpenSSL 3.6.4. OpenSSL 3.5 users should upgrade to OpenSSL 3.5.8. OpenSSL 3.4 users should upgrade to OpenSSL 3.4.7. OpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.  Premium support customers only: OpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi OpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr  This issue was reported on 18 May 2026 by Amazon Web Services. The fix has been developed by Matt Caswell.  -- cut (non-publishing metadata for internal use) -- Reported by: Amazon Web Services Fixed by: Matt Caswell","status":"published","published":"2026-08-25T13:19:24.033Z","modified":"2026-10-01T03:03:18.777127652Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:57.236551Z"},{"id":"OESA-2026-3819","title":"compat-openssl11 security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-14T16:34:42Z","modified":"2026-09-13T16:45:43.30261226Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"OESA-2026-3820","title":"compat-openssl11 security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-14T16:34:42Z","modified":"2026-09-13T16:45:43.3050172Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"OESA-2026-3826","title":"openssl security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-14T16:34:45Z","modified":"2026-09-13T16:45:45.766086325Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"OESA-2026-3827","title":"openssl security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-14T16:34:46Z","modified":"2026-09-13T16:45:45.769196615Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"OESA-2026-3828","title":"openssl security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-14T16:34:47Z","modified":"2026-09-13T16:45:45.763168831Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.217107Z"},{"id":"OESA-2026-3829","title":"openssl security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-14T16:34:47Z","modified":"2026-09-13T16:45:46.378407747Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-3830","title":"openssl security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: In a server or client configuration with RFC7250 Raw Public Keys (RPKs)\nenabled, and only the private key (with no associated certificate) configured locally,\na NULL pointer dereference may occur when the remote peer solicits raw public keys and\nalso sends the typically omitted \u0026quot;signature_algorithms_cert\u0026quot; TLS extension.\n\nImpact summary: The impact is limited to a possible Denial of Service as a result of\nan application abort, no data disclosure or remote command execution are possible.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: While a passing comment in sample code in the documentation suggests\nthat key-only RPK configurations are supported, the best-practice RPK configuration\nis to always configure a corresponding certificate (possibly self-signed or\nsigned by any convenient CA).\n\nWhen the private key is configured along with a matching certificate, the\n\u0026quot;signature_algorithms_cert\u0026quot; extension is handled reliably even without the\nfix, and peer clients or servers that don\u0026apos;t support raw public keys may be\nable to complete a TLS connection by pinning or verifying the corresponding\ncertificate or its public key.\n\nDeployments that prefer to configure just a private key with no certificate\nneed to upgrade to an updated release as noted below.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue, as the SSL protocol implementation\nis outside the OpenSSL FIPS module boundary.(CVE-2026-14457)\n\nIssue summary: QUIC server may double free QRX (QUIC record layer RX) object\nwhen channel creation fails for initial packet.\n\nImpact summary: Double free leads to heap corruption, which typically results in \ntermination of QUIC server process, leading to Denial of Service. There is so\nfar no evidence that this double free is exploitable for remote code execution,\nthus it is considered highly improbable.\n\nCWE: CWE-415: Double Free\n\nDescription: In order to validate initial packet, OpenSSL QUIC stack default\npacket handler (port_default_packet_handler()) creates a so-called QRX object.\nIf the initial packet validates successfully with QRX object, the default packet\nhandler proceeds to channel (connection object) creation. The QRX object used\nfor packet validation is passed to port_bind_channel(), so it becomes part of\nthe newly created connection. If port_bind_channel() fails, then it also frees\nthe QRX object. Once port_bind_channel() returns, the port_default_packet_handler()\ndetects the failure and proceeds to the error branch, where the same QRX object is\nfreed for the second time.\n\nThe failure in port_bind_channel() function can be induced with a relatively\nlow effort by a malformed (non RFC 9000 compliant) INITIAL packet. If the packet\ncarries DCID (destination connection ID) which is shorter than 8 bytes, then\nport_bind_channel() jumps to the error path after ossl_quic_lcidm_enrol_odcid()\ndetects that the DCID has invalid length.\n\nFIPS impact: no\nThe FIPS module is not affected, as the QUIC implementation is outside of\nthe OpenSSL FIPS module boundary.(CVE-2026-18798)\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)\n\nIssue summary: OpenSSL CMP response validation passed an unexpected response\nsender distinguished name directly as the format string to `ERR_raise_data()`.\n\nImpact summary: A malicious or intercepted CMP endpoint can crash a CMP client\nthat enforces an expected sender or uses a pinned server certificate whose\nsubject becomes the default expected sender.\n\nCWE: CWE-134 (Use of Externally-Controlled Format String)\n\nDescription: When validating a received CMP message, ossl_cmp_msg_check_update()\nconverts the peer-supplied sender distinguished name with X509_NAME_oneline()\nand passes it directly as the format argument to ERR_raise_data(). Percent\ncharacters survive the conversion, so a sender DN such as \u0026quot;CN=%s%n\u0026quot; reaches\nBIO_vsnprintf() as an attacker-controlled format string with no matching variadic\narguments. This path is only reached when the caller configures an expected\nsender or pins a server certificate, which is the normal configuration for a\nCMP client validating server responses.\n\nSince the attacker controls the format string but none of the variadic\narguments, such specifiers as %s and %n dereference or write through unrelated\nstack contents and crash the client. The reliable consequence is a denial of\nservice, when the response comes from a malicious or intercepted CMP endpoint.\nThere is no controlled memory write, arbitrary-address read, or reliable path\nto remote code execution.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue, as the CMP protocol\nimplementation is outside the OpenSSL FIPS module boundary.(CVE-2026-63073)\n\nIssue summary: The OpenSSL Certificate Management Protocol (CMP) caches\nadditional certificates (extraCerts) sent in a CMP message, but never expunges\nthem (for instance if they are invalid).  If a server reuses an OSSL_CMP_CTX\nfrequently, this cache of extraCerts may grow unboundedly, and a malicious\nclient may flood a CMP server with requests driving this growth.\n\nImpact summary: Users utilizing a CMP server that reuses a single OSSL_CMP_CTX\nfor the lifetime of a server process may observe unbounded memory growth in the\nevent a malicious client repeatedly sends requests containing unique extra\ncertificates, which may lead to OOM conditions.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: If a remote user sends CMP messages to a server with a list of\nextraCerts and the message is rejected, the extraCerts from the message remains\nin the server contexts untrusted certificate stack.  This exposes servers with\nlong lived ctx objects to Denial of Service attacks in which an attacker sends\nmessages intending to be rejected with a large list of additional certificates\nrepeatedly, forcing the server to store them indefinitely.\n   \nThe issue was fixed by removing the added extra certs if the message is\nrejected, using the same method as when the context is configured to not do\ncaching at all.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63074)\n\nIssue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly\nsends ack-eliciting packets while not acknowledging ACK-only responses, the\nQUIC stack can retain ACK-only packet metadata for the lifetime of the\nconnection.\n\nImpact summary: A remote peer that can complete a QUIC handshake can\ncause connection-scoped memory growth which may lead to Denial of Service\nthrough memory exhaustion, especially with sustained traffic or many concurrent\nQUIC connections.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: When the OpenSSL QUIC stack sends an ACK-only packet,\nthere is no requirement by the QUIC protocol that the peer will acknowledge\nthat ACK-only packet (i.e. it is itself not ack-eliciting). However, the OpenSSL\nimplementation stores the metadata about the ACK frames regardless.\nIn and of itself that\u0026apos;s ok, but if a malicious peer establishes a connection, and\nthen drives the connection such that ACK-only packets are forced from the \nOpenSSL implementation peer (i.e., by sending numerous PING frames),\nand then withholding any subsequent acks for ack-eliciting data, like\nlegitimate data, said malicious peer can force inappropriate memory growth\non the OpenSSL peer, potentially leading to a Denial of Service.\n\nThe fix is to ensure that we account for the transmission of the ACK-only\npacket in the packet histories high and low watermark without actually storing\nthe ACK-only packet metadata itself.\n\nFIPS impact: no\nThe OpenSSL FIPS module is not affected as the QUIC code is\noutside the FIPS module boundary.(CVE-2026-63075)\n\nIssue summary: OpenSSL CMP password based protection verification only\nchecks whether the protectionAlg parameter was not NULL and not its\nASN.1 type, before treating it as a PBMParameter. A crafted message can\ncontain a parameter of a different type, which is then dereferenced as an\ninvalid pointer.\n\nImpact summary: A remote, unauthenticated attacker can crash an application\nacting as a CMP server that accepts PBM-protected messages, or a CMP client\ntalking to a malicious or intercepted CMP server, resulting in a Denial of\nService.\n\nCWE: CWE-476: NULL Pointer Dereference\n\nDescription: When verifying the password-based MAC protection of a CMP\nmessage, OpenSSL library reads the protectionAlg algorithm parameter with\nX509_ALGOR_get0(), which returns both the parameter type and its value\npointer. The value is then cast to an ASN1_STRING and treated as the\nexpected PBMParameter after only checking that pointer is not NULL. The\nparameter type returned by X509_ALGOR_get0() was never consulted.\n\nThis happens during protection verification, before any MAC is computed, so\nno knowledge of the PBM shared secret is required; the only precondition is\nthat PBM verification is reachable. On the server side this is reached from\nOSSL_CMP_SRV_process_request() for any application that stands up a CMP\nserver accepting PBM-protected messages, and on the client side from CMP\nresponse validation against a malicious or on-path (MITM) server. The\nreliable consequence is a denial of service; there is no memory disclosure,\nno controlled memory write, and no path to code execution. CMP is a\nspecialized feature that an application must explicitly enable.\n\nFIPS impact: no\nAs the CMP code lives outside the FIPS module boundary, no FIPS modules\nare affected by this CVE.(CVE-2026-63076)\n\nA vulnerability was discovered in SourceCodester Simple Online Food Ordering System 1.0. The vulnerability affects unknown processing logic of the file /admin/ajax.php?action=save_menu. Manipulation of the img parameter results in arbitrary file uploads. Attackers can launch attacks remotely. The exploit code for this vulnerability has been made public and may be exploited.(CVE-2026-75803)","status":"published","published":"2026-09-14T16:34:47Z","modified":"2026-09-13T16:45:51.96023024Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"OESA-2026-3983","title":"compat-openssl11 security update","description":"OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols.\r\n\r\nSecurity Fix(es):\n\nIssue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell(CVE-2026-54874)\n\nIssue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based\non querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive\ncan write and cleanse more bytes than that query reports, causing an 8-byte\nout-of-bounds heap write.\n\nImpact summary: An attacker who supplies a crafted CMS message can trigger a\ndeterministic 8-byte out-of-bounds heap write when the victim decrypts it\nwith CMS_decrypt(), corrupting the heap and typically resulting in a Denial\nof Service.\n\nCWE: CWE-787: Out-of-bounds Write\n\nDescription: The key-wrap OID is potentially attacker-controlled on the wire.\nCMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers.\nAn attacker can take a legitimate message and change a single OID byte to\nselect the padded variant while leaving the message otherwise valid. Since\nthe unwrap key is derived from the recipient\u0026apos;s private operation (ECDH key\nagreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot\npass, and the decryption fails with integrity failure.\n\nThe write is a fixed-size (8-byte), fixed-value (zero) heap overflow\nimmediately past the allocation, requires no special configuration, and is\nreachable from the public CMS_decrypt() function. The consequence is\na heap corruption leading to a Denial of Service. The fix in the CMS code\nsizes the unwrap output buffer for the worst case so a failed unwrap cannot\nwrite past the allocation.\n\nFIPS impact: no\n\nAs the CMS code lives outside the FIPS module boundary, no FIPS\nmodules are affected by this CVE.(CVE-2026-63072)","status":"published","published":"2026-09-20T13:23:48Z","modified":"2026-09-20T13:30:28.281404064Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:47.643553Z"},{"id":"RHSA-2026:59635","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-27T10:15:54Z","modified":"2026-10-20T10:12:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:59641","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-08-27T10:15:54Z","modified":"2026-10-20T10:12:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:67154","title":"Red Hat Security Advisory: openssl security, bug fix, and enhancement update","status":"published","published":"2026-09-14T10:10:19Z","modified":"2026-10-20T10:13:45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.406388Z"},{"id":"RHSA-2026:67165","title":"Red Hat Security Advisory: openssl security, bug fix, and enhancement update","status":"published","published":"2026-09-14T10:10:23Z","modified":"2026-10-20T10:13:48Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.406388Z"},{"id":"RLSA-2026:67154","title":"Important: openssl security, bug fix, and enhancement update","description":"OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.\n\nSecurity Fix(es):\n\n* openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)\n\n* openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)\n\n* openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)\n\n* openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)\n\n* openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)\n\n* openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)\n\n* openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)\n\n* openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)\n\n* openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)\n\nBug Fix(es) and Enhancement(s):\n\n* openssl: HollowByte remote memory-exhaustion DoS fix may be missing [Rocky Linux 10.2.z] (JIRA:Rocky Linux-212362)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-09-15T12:08:56.876794Z","modified":"2026-09-15T12:30:03.316187917Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.449929Z"},{"id":"RLSA-2026:67165","title":"Important: openssl security, bug fix, and enhancement update","description":"OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.\n\nSecurity Fix(es):\n\n* openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)\n\n* openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)\n\n* openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)\n\n* openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)\n\n* openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)\n\n* openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)\n\n* openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)\n\n* openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)\n\n* openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)\n\nBug Fix(es) and Enhancement(s):\n\n* openssl: HollowByte remote memory-exhaustion DoS fix may be missing [Rocky Linux 9.8.z] (JIRA:Rocky Linux-232828)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-09-15T18:05:37.908911Z","modified":"2026-09-15T18:30:36.357804882Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.449929Z"},{"id":"UBUNTU-CVE-2026-54874","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake is in progress causes OpenSSL to buffer far more memory than the record itself requires. Impact summary: A peer can use a small amount of network traffic to make an OpenSSL DTLS endpoint retain a disproportionately large amount of memory, which may lead to a Denial of Service. CWE: CWE-405: Asymmetric Resource Consumption (Amplification) Description: While a DTLS handshake is in progress, a peer may legitimately have already moved on to the next epoch (for example, having sent its ChangeCipherSpec and Finished messages) before the local endpoint has processed the same transition, typically because of reordering on the underlying UDP transport. OpenSSL buffers such early records so that they can be processed once the local endpoint catches up. Buffering a record currently retains the entire read buffer it arrived in, which is sized to hold the largest possible DTLS record (around 16 kilobytes), rather than just the bytes that make up the record itself. Up to 100 such records may be buffered per connection. As a result, a peer that sends a stream of small forged records claiming to belong to the next epoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of memory, despite sending only a small fraction of that amount of data over the network. An attacker therefore gains a memory amplification factor of around 1200, and can multiply the effect across as many associations as it is able to open, making this a remote memory exhaustion Denial of Service risk for DTLS servers. Since the memory retained per connection remains bounded, and any limit an application already places on the number of concurrent associations also bounds the total exposure, this issue has been assessed as Low severity. FIPS impact: no No FIPS modules are affected by this issue as the affected code is outside the OpenSSL FIPS module boundary. OpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue. OpenSSL 4.0 users should upgrade to OpenSSL 4.0.2. OpenSSL 3.6 users should upgrade to OpenSSL 3.6.4. OpenSSL 3.5 users should upgrade to OpenSSL 3.5.8. OpenSSL 3.4 users should upgrade to OpenSSL 3.4.7. OpenSSL 3.0 users should upgrade to OpenSSL 3.0.22. Premium support customers only: OpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi OpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr This issue was reported on 18 May 2026 by Amazon Web Services. The fix has been developed by Matt Caswell. -- cut (non-publishing metadata for internal use) -- Reported by: Amazon Web Services Fixed by: Matt Caswell","status":"published","published":"2026-08-25T00:00:00Z","modified":"2026-10-22T04:30:59.613399101Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:41.382716Z"},{"id":"ALSA-2026:67154","title":"Important: openssl security, bug fix, and enhancement update","description":"OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.  \n\nSecurity Fix(es):  \n\n  * openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)\n  * openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)\n  * openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)\n  * openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)\n  * openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)\n  * openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)\n  * openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)\n  * openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)\n  * openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * openssl: HollowByte remote memory-exhaustion DoS fix may be missing [AlmaLinux 10.2.z] (JIRA:AlmaLinux-212362)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-09-14T00:00:00Z","modified":"2026-10-29T11:30:43.111044556Z","updated_at":"2026-11-02T15:27:55.200553Z"},{"id":"ALSA-2026:67165","title":"Important: openssl security, bug fix, and enhancement update","description":"OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.  \n\nSecurity Fix(es):  \n\n  * openssl: OpenSSL: Denial of Service via unbounded memory growth in QUIC server (CVE-2026-14456)\n  * openssl: QUIC server may trigger double free when processing INITIAL packet (CVE-2026-18798)\n  * openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072)\n  * openssl: invalid pointer dereference in CMP server via crafted protectionAlg (CVE-2026-63076)\n  * openssl: RPK server signature algorithm selection can dereference a missing certificate (CVE-2026-14457)\n  * openssl: excessive memory use buffering DTLS records for a future epoch (CVE-2026-54874)\n  * openssl: untrusted sender DN used as format string in CMP response validation (CVE-2026-63073)\n  * openssl: CMP indefinite cache growth of ExtraCerts (CVE-2026-63074)\n  * openssl: QUIC ACK-only packet retention can cause memory exhaustion (CVE-2026-63075)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * openssl: HollowByte remote memory-exhaustion DoS fix may be missing [AlmaLinux 9.8.z] (JIRA:AlmaLinux-232828)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-09-14T00:00:00Z","modified":"2026-10-29T11:42:20.862114128Z","updated_at":"2026-11-02T15:27:55.200553Z"},{"id":"AZL-97668","title":"CVE-2026-54874 affecting package openssl-fips-provider 3.1.2-2","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T13:19:24Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:26.280152Z"},{"id":"AZL-97953","title":"CVE-2026-54874 affecting package openssl for versions less than 3.3.7-6","description":"Issue summary: Receiving a DTLS record for a future epoch while a handshake\nis in progress causes OpenSSL to buffer far more memory than the record\nitself requires.\n\nImpact summary: A peer can use a small amount of network traffic to make an\nOpenSSL DTLS endpoint retain a disproportionately large amount of memory,\nwhich may lead to a Denial of Service.\n\nCWE: CWE-405: Asymmetric Resource Consumption (Amplification)\n\nDescription: While a DTLS handshake is in progress, a peer may legitimately\nhave already moved on to the next epoch (for example, having sent its\nChangeCipherSpec and Finished messages) before the local endpoint has\nprocessed the same transition, typically because of reordering on the\nunderlying UDP transport. OpenSSL buffers such early records so that they\ncan be processed once the local endpoint catches up.\n\nBuffering a record currently retains the entire read buffer it arrived in,\nwhich is sized to hold the largest possible DTLS record (around 16\nkilobytes), rather than just the bytes that make up the record itself. Up\nto 100 such records may be buffered per connection. As a result, a peer\nthat sends a stream of small forged records claiming to belong to the next\nepoch can cause an OpenSSL DTLS endpoint to retain around 1.7 megabytes of\nmemory, despite sending only a small fraction of that amount of data over\nthe network.\n\nAn attacker therefore gains a memory amplification factor of around 1200,\nand can multiply the effect across as many associations as it is able to\nopen, making this a remote memory exhaustion Denial of Service risk for\nDTLS servers. Since the memory retained per connection remains bounded,\nand any limit an application already places on the number of concurrent\nassociations also bounds the total exposure, this issue has been assessed\nas Low severity.\n\nFIPS impact: no\n\nNo FIPS modules are affected by this issue as the affected code is outside\nthe OpenSSL FIPS module boundary.\n\nOpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1 and 1.0.2 are vulnerable to this\nissue.\n\nOpenSSL 4.0 users should upgrade to OpenSSL 4.0.2.\nOpenSSL 3.6 users should upgrade to OpenSSL 3.6.4.\nOpenSSL 3.5 users should upgrade to OpenSSL 3.5.8.\nOpenSSL 3.4 users should upgrade to OpenSSL 3.4.7.\nOpenSSL 3.0 users should upgrade to OpenSSL 3.0.22.\n\nPremium support customers only:\nOpenSSL 1.1.1 users should upgrade to OpenSSL 1.1.1zi\nOpenSSL 1.0.2 users should upgrade to OpenSSL 1.0.2zr\n\nThis issue was reported on 18 May 2026 by Amazon Web Services.\nThe fix has been developed by Matt Caswell.\n\n-- cut (non-publishing metadata for internal use) --\nReported by: Amazon Web Services\nFixed by: Matt Caswell","status":"published","published":"2026-08-25T13:19:24Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:26.280152Z"},{"id":"CLSA-2026-1788263953","title":"openssl: Fix of CVE-2026-54874","description":"- CVE-2026-54874: avoid buffering the whole DTLS read buffer for a record\n  arriving early for the next epoch, capping per-connection memory\n  amplification","status":"published","published":"2026-09-03T08:38:55Z","modified":"2026-10-26T09:31:39.409138471Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788264233","title":"openssl: Fix of CVE-2026-54874","description":"- CVE-2026-54874: avoid buffering the whole DTLS read buffer for a record\n  arriving early for the next epoch, capping per-connection memory\n  amplification","status":"published","published":"2026-09-01T12:04:03Z","modified":"2026-10-26T09:31:48.778270097Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788264701","title":"openssl: Fix of 2 CVEs","description":"- CVE-2026-54874: fix excessive memory use when buffering DTLS records for a future epoch by copying only the record's own bytes instead of the whole read buffer, and lowering the unprocessed-records queue limit to 16\n- CVE-2026-63072: fix 8-byte out-of-bounds heap write in CMS key unwrapping by sizing the AES-WRAP-PAD unwrap output buffer for the worst case","status":"published","published":"2026-09-01T12:11:54Z","modified":"2026-10-26T09:31:51.3145831Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788264910","title":"Fix CVE(s): CVE-2026-54874, CVE-2026-63072","description":"   * SECURITY UPDATE: avoid buffering the whole DTLS read buffer for a record arriving early for the next epoch (ssl/record/rec_layer_d1.c)\n     - debian/patches/CVE-2026-54874.patch: avoid buffering the whole DTLS read buffer for a record arriving early for the next epoch (ssl/record/rec_layer_d1.c)\n     - CVE-2026-54874\n   * SECURITY UPDATE: fix 8-byte out-of-bounds heap write in CMS AES-WRAP-PAD key unwrapping (crypto/cms/cms_kari.c)\n     - debian/patches/CVE-2026-63072.patch: fix 8-byte out-of-bounds heap write in CMS AES-WRAP-PAD key unwrapping (crypto/cms/cms_kari.c)\n     - debian/patches/CVE-2026-63072-test.patch: add the upstream regression test for the AES-WRAP-PAD unwrap overflow (test/cmsapitest.c)\n     - CVE-2026-63072","status":"published","published":"2026-09-01T12:15:22Z","modified":"2026-10-26T09:31:53.070144819Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788265101","title":"openssl: Fix of CVE-2026-54874","description":"- CVE-2026-54874: avoid buffering the whole DTLS read buffer for a record\n  arriving early for the next epoch, capping per-connection memory\n  amplification","status":"published","published":"2026-09-01T12:18:32Z","modified":"2026-10-26T09:31:58.771182058Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788271054","title":"Fix CVE(s): CVE-2026-54874, CVE-2026-63072","description":"   * SECURITY UPDATE: Memory amplification denial of service in the DTLS\n     record layer: buffering a record that arrives early for the next epoch\n     retained the entire read buffer, sized for the largest possible DTLS\n     record (~16.7KB), rather than only the record's own bytes, so a peer\n     sending a stream of small forged next-epoch records could make an\n     endpoint retain around 1.7MB per connection.\n     - debian/patches/CVE-2026-54874.patch: copy only the record's on-wire\n       bytes into the queue entry and rebase the record pointers on\n       retrieval in ssl/record/rec_layer_d1.c, ssl/record/record.h,\n       ssl/record/record_local.h and ssl/record/ssl3_record.c, and lower\n       the unprocessed_rcds queue limit to 16.\n     - CVE-2026-54874\n   * SECURITY UPDATE: Out-of-bounds heap write in CMS decryption: the\n     key-unwrap output buffer was sized from the cipher's length query, but\n     the AES-WRAP-PAD unwrap primitive writes and cleanses up to inlen bytes\n     on its integrity-failure paths, so a crafted CMS message naming a\n     padded key-wrap OID caused an 8-byte write past the allocation.\n     - debian/patches/CVE-2026-63072.patch: size the unwrap output buffer\n       for the worst case in cms_kek_cipher() in crypto/cms/cms_kari.c.\n     - CVE-2026-63072","status":"published","published":"2026-09-01T13:57:45Z","modified":"2026-10-26T09:31:40.149918297Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788271692","title":"openssl: Fix of 2 CVEs","description":"- CVE-2026-54874: fix excessive memory use when buffering DTLS records for a future epoch by copying only the record's own bytes instead of the whole read buffer, and lowering the unprocessed-records queue limit to 16\n- CVE-2026-63072: fix 8-byte out-of-bounds heap write in CMS key unwrapping by sizing the AES-WRAP-PAD unwrap output buffer for the worst case","status":"published","published":"2026-09-01T14:08:24Z","modified":"2026-10-26T09:31:50.613617799Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788271978","title":"openssl: Fix of 2 CVEs","description":"- CVE-2026-54874: fix excessive memory use when buffering DTLS records for a future epoch by copying only the record's own bytes instead of the whole read buffer, and lowering the unprocessed-records queue limit to 16\n- CVE-2026-63072: fix 8-byte out-of-bounds heap write in CMS key unwrapping by sizing the AES-WRAP-PAD unwrap output buffer for the worst case","status":"published","published":"2026-09-01T14:13:11Z","modified":"2026-10-26T09:31:38.49781452Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788339545","title":"openssl: Fix of 2 CVEs","description":"- CVE-2026-54874: avoid allocating a full read buffer for each buffered DTLS\n  next-epoch record and lower the unprocessed_rcds queue limit; prevents\n  excessive memory use from small bogus next-epoch records\n- CVE-2026-63072: size the CMS key-unwrap output buffer for the worst case\n  written by AES-WRAP-PAD; prevents an 8-byte out-of-bounds heap write in\n  cms_kek_cipher (crypto/cms/cms_kari.c)","status":"published","published":"2026-09-02T08:59:17Z","modified":"2026-10-26T09:31:15.737719444Z","updated_at":"2026-11-02T15:43:47.591214Z"},{"id":"CLSA-2026-1788856499","title":"Fix CVE(s): CVE-2026-54874, CVE-2026-63072","description":"   * SECURITY UPDATE: Unbounded memory retention in the DTLS record layer.\n     dtls1_buffer_record() adopted the entire live read buffer for every queued\n     record and allocated a fresh one, so a peer could pin roughly 16.7 KB of\n     heap per queued record regardless of how small the record actually was,\n     up to the 100-entry queue limit, exhausting memory on the endpoint.\n     - debian/patches/CVE-2026-54874.patch: copy only the received record into\n       a right-sized allocation and restore it on retrieval, leaving the live\n       read buffer in place, in ssl/record/rec_layer_d1.c, ssl/record/record.h\n       and ssl/record/ssl3_record.c.\n     - CVE-2026-54874\n   * SECURITY UPDATE: Heap buffer overflow in CMS key-agreement recipient\n     processing. For AES key wrap with padding the output size query returns\n     inlen-8 and drives the allocation, while the key-unwrap failure paths\n     then cleanse the full inlen, writing eight bytes past the allocation.\n     - debian/patches/CVE-2026-63072.patch: allocate at least the input length\n       in cms_kek_cipher() in crypto/cms/cms_kari.c.\n     - debian/patches/CVE-2026-63072-test.patch: add the upstream regression\n       test to test/cmsapitest.c and test/recipes/80-test_cmsapi.t.\n     - CVE-2026-63072","status":"published","published":"2026-09-08T08:35:09Z","modified":"2026-10-26T09:32:03.922819167Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1788951485","title":"Fix CVE(s): CVE-2026-54874","description":"   * SECURITY UPDATE: Unbounded memory retention in the DTLS record layer.\n     dtls1_buffer_record() adopted the entire live read buffer for every queued\n     record and allocated a fresh one, so a peer could pin roughly 17.7 KB of\n     heap per queued record regardless of how small the record actually was,\n     up to the 100-entry queue limit, exhausting memory on the endpoint.\n     - debian/patches/CVE-2026-54874.patch: copy only the received record into\n       a right-sized allocation and restore it on retrieval, leaving the live\n       read buffer in place, in ssl/d1_pkt.c, ssl/d1_lib.c and ssl/dtls1.h.\n     - CVE-2026-54874","status":"published","published":"2026-09-09T10:58:16Z","modified":"2026-10-26T09:32:02.239043745Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789551334","title":"openssl: Fix of 2 CVEs","description":"- CVE-2026-54874: buffer only a DTLS record's own bytes instead of the whole\n  read buffer, and lower the unprocessed records queue limit, to avoid remote\n  memory exhaustion\n- CVE-2026-63072: size the CMS key-unwrap output buffer for the AES-WRAP-PAD\n  worst case to prevent an 8-byte out-of-bounds heap write in CMS_decrypt()","status":"published","published":"2026-09-16T09:35:44Z","modified":"2026-10-26T09:30:49.020816106Z","updated_at":"2026-11-02T15:43:47.938828Z"},{"id":"CLSA-2026-1789604584","title":"openssl11: Fix of CVE-2026-54874","description":"- CVE-2026-54874: copy only a DTLS record's own on-wire bytes when buffering\n  it for a future epoch, instead of taking ownership of the whole ~16KB read\n  buffer and allocating a fresh one","status":"published","published":"2026-09-21T23:27:47Z","modified":"2026-10-26T09:31:48.750384365Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789605435","title":"openssl11: Fix of CVE-2026-54874","description":"- CVE-2026-54874: copy only a DTLS record's own on-wire bytes when buffering\n  it for a future epoch, instead of taking ownership of the whole ~16KB read\n  buffer and allocating a fresh one","status":"published","published":"2026-09-17T00:37:27Z","modified":"2026-10-26T09:31:58.925492184Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789605650","title":"openssl11: Fix of CVE-2026-54874","description":"- CVE-2026-54874: copy only a DTLS record's own on-wire bytes when buffering\n  it for a future epoch, instead of taking ownership of the whole ~16KB read\n  buffer and allocating a fresh one","status":"published","published":"2026-09-17T00:41:01Z","modified":"2026-10-26T09:31:56.218959335Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"CLSA-2026-1789631727","title":"openssl: Fix of CVE-2026-54874","description":"- CVE-2026-54874: avoid buffering the whole DTLS read buffer for a record\n  arriving early for the next epoch, capping per-connection memory\n  amplification","status":"published","published":"2026-09-17T07:55:39Z","modified":"2026-10-26T09:31:56.215233465Z","updated_at":"2026-11-02T15:43:48.28229Z"},{"id":"MGASA-2026-0353","title":"Updated openssl packages fix security vulnerabilities","description":"Unbounded Memory Growth in QUIC Server Incoming Channel Queue.\n(CVE-2026-14456)\nQUIC Server May Trigger Double Free When Processing INITIAL Packet.\n(CVE-2026-18798)\nHeap Buffer Overflow in CMS Key Unwrapping. (CVE-2026-63072)\nInvalid Pointer Dereference in CMP Server via Crafted protectionAlg.\n(CVE-2026-63076)\nRPK Server Signature Algorithm Selection Can Dereference a Missing\nCertificate. (CVE-2026-14457)\nExcessive Memory Use Buffering DTLS Records for a Future Epoch.\n(CVE-2026-54874)\nUntrusted Sender DN Used as Format String in CMP Response Validation.\n(CVE-2026-63073)\nCMP Indefinite Cache Growth of ExtraCerts. (CVE-2026-63074)\nQUIC ACK-only Packet Retention Can Cause Memory Exhaustion.\n(CVE-2026-63075)\n","status":"published","published":"2026-08-31T19:40:26Z","modified":"2026-08-31T19:56:27.732690321Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:11623-1","title":"libopenssl-3-devel-3.5.3-8.1 on GA media","description":"These are all security issues fixed in the libopenssl-3-devel-3.5.3-8.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-08-27T00:00:00Z","modified":"2026-08-28T18:23:08.790866431Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"openSUSE-SU-2026:21744-1","title":"Security update for openssl-3","description":"This update for openssl-3 fixes the following issues:\n\nAugust 2026 release.\n\n- CVE-2026-14456: unbounded memory growth in QUIC server incoming channel queue (bsc#1274791).\n- CVE-2026-14457: RPK server signature algorithm selection can dereference a missing certificate (bsc#1274792).\n- CVE-2026-18798: QUIC server may trigger double free when processing INITIAL packet (bsc#1274777).\n- CVE-2026-34181: PKCS#12 files with PBMAC1 are accepted with short HMAC keys (bsc#1266343).\n- CVE-2026-54874: excessive memory use buffering DTLS records for a future epoch (bsc#1274795).\n- CVE-2026-63072: heap buffer overflow in CMS key unwrapping (bsc#1274788).\n- CVE-2026-63073: untrusted sender DN used as format string in CMP response validation (bsc#1274796).\n- CVE-2026-63074: CMP indefinite cache growth of `ExtraCerts` (bsc#1274797).\n- CVE-2026-63075: QUIC ACK-only packet retention can cause memory exhaustion (bsc#1274798).\n- CVE-2026-63076: invalid pointer dereference in CMP server via crafted `protectionAlg` (bsc#1274790).\n- CVE-2026-75803: AEAD forgeries with empty ciphertext when using `EVP_Cipher()` (bsc#1275837).\n","status":"published","published":"2026-09-02T15:55:21Z","modified":"2026-09-09T18:23:13.577661775Z","updated_at":"2026-11-02T16:58:42.426393Z"},{"id":"ROOT-OS-ALPINE-315-CVE-2026-54874","title":"CVE-2026-54874 in openssl - Patched by Root","description":"Root has patched CVE-2026-54874 in the openssl package for Root:Alpine:3.15. Multiple fixed versions available.","status":"published","published":"2026-10-13T15:12:42Z","modified":"2026-10-13T16:15:37.77272506Z","updated_at":"2026-11-02T15:53:28.259095Z"},{"id":"ROOT-OS-ALPINE-317-CVE-2026-54874","title":"CVE-2026-54874 in openssl - Patched by Root","description":"Root has patched CVE-2026-54874 in the openssl package for Root:Alpine:3.17. Multiple fixed versions available.","status":"published","published":"2026-10-15T06:28:37Z","modified":"2026-10-15T07:15:05.108070417Z","updated_at":"2026-11-02T15:53:28.259095Z"},{"id":"ROOT-OS-DEBIAN-11-CVE-2026-54874","title":"CVE-2026-54874 in openssl - Patched by Root","description":"Root has patched CVE-2026-54874 in the openssl package for Root:Debian:11. Multiple fixed versions available.","status":"published","published":"2026-09-11T07:27:28Z","modified":"2026-09-11T08:15:08.775972227Z","updated_at":"2026-11-02T15:53:30.44348Z"},{"id":"ROOT-OS-DEBIAN-12-CVE-2026-54874","title":"CVE-2026-54874 in openssl - Patched by Root","description":"Root has patched CVE-2026-54874 in the openssl package for Root:Debian:12. Multiple fixed versions available.","status":"withdrawn","published":"2026-10-06T13:42:18Z","modified":"2026-10-09T13:00:13.981747581Z","updated_at":"2026-11-02T15:53:32.298225Z"},{"id":"SUSE-SU-2026:23463-1","title":"Security update for openssl-3","description":"This update for openssl-3 fixes the following issues:\n\nAugust 2026 release.\n\n- CVE-2026-14456: unbounded memory growth in QUIC server incoming channel queue (bsc#1274791).\n- CVE-2026-14457: RPK server signature algorithm selection can dereference a missing certificate (bsc#1274792).\n- CVE-2026-18798: QUIC server may trigger double free when processing INITIAL packet (bsc#1274777).\n- CVE-2026-34181: PKCS#12 files with PBMAC1 are accepted with short HMAC keys (bsc#1266343).\n- CVE-2026-54874: excessive memory use buffering DTLS records for a future epoch (bsc#1274795).\n- CVE-2026-63072: heap buffer overflow in CMS key unwrapping (bsc#1274788).\n- CVE-2026-63073: untrusted sender DN used as format string in CMP response validation (bsc#1274796).\n- CVE-2026-63074: CMP indefinite cache growth of `ExtraCerts` (bsc#1274797).\n- CVE-2026-63075: QUIC ACK-only packet retention can cause memory exhaustion (bsc#1274798).\n- CVE-2026-63076: invalid pointer dereference in CMP server via crafted `protectionAlg` (bsc#1274790).\n- CVE-2026-75803: AEAD forgeries with empty ciphertext when using `EVP_Cipher()` (bsc#1275837).\n","status":"published","published":"2026-09-02T15:59:12Z","modified":"2026-09-14T18:23:12.065783412Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:23473-1","title":"Security update for openssl-3","description":"This update for openssl-3 fixes the following issues:\n\nAugust 2026 release.\n\n- CVE-2026-75803: AEAD forgeries with empty ciphertext when using `EVP_Cipher()` (bsc#1275837).\n- CVE-2026-54874: excessive memory use when buffering DTLS records for a future epoch (bsc#1274795).\n- CVE-2026-63072: heap buffer overflow in CMS key unwrapping (bsc#1274788).\n- CVE-2026-63074: unbounded growth of `extraCerts` cache in the CMP server (bsc#1274797).\n- CVE-2026-63076: invalid pointer dereference in the CMP server via crafted `protectionAlg` (bsc#1274790).\n","status":"published","published":"2026-09-04T09:08:57Z","modified":"2026-09-14T18:23:12.160388317Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:23512-1","title":"Security update for openssl-3","description":"This update for openssl-3 fixes the following issues:\n  \nAugust 2026 release.\n\n- CVE-2026-75803: AEAD forgeries with empty ciphertext when using `EVP_Cipher()` (bsc#1275837).\n- CVE-2026-54874: excessive memory use when buffering DTLS records for a future epoch (bsc#1274795).\n- CVE-2026-63072: heap buffer overflow in CMS key unwrapping (bsc#1274788).\n- CVE-2026-63074: unbounded growth of `extraCerts` cache in the CMP server (bsc#1274797).\n- CVE-2026-63076: invalid pointer dereference in the CMP server via crafted `protectionAlg` (bsc#1274790).\n","status":"published","published":"2026-09-02T09:10:40Z","modified":"2026-09-16T18:23:08.345658622Z","updated_at":"2026-11-02T15:54:03.991985Z"},{"id":"SUSE-SU-2026:23609-1","title":"Security update for openssl-3","description":"This update for openssl-3 fixes the following issues:\n\nAugust 2026 release.\n\n- CVE-2026-14456: unbounded memory growth in QUIC server incoming channel queue (bsc#1274791).\n- CVE-2026-14457: RPK server signature algorithm selection can dereference a missing certificate (bsc#1274792).\n- CVE-2026-18798: QUIC server may trigger double free when processing INITIAL packet (bsc#1274777).\n- CVE-2026-34181: PKCS#12 files with PBMAC1 are accepted with short HMAC keys (bsc#1266343).\n- CVE-2026-54874: excessive memory use buffering DTLS records for a future epoch (bsc#1274795).\n- CVE-2026-63072: heap buffer overflow in CMS key unwrapping (bsc#1274788).\n- CVE-2026-63073: untrusted sender DN used as format string in CMP response validation (bsc#1274796).\n- CVE-2026-63074: CMP indefinite cache growth of `ExtraCerts` (bsc#1274797).\n- CVE-2026-63075: QUIC ACK-only packet retention can cause memory exhaustion (bsc#1274798).\n- CVE-2026-63076: invalid pointer dereference in CMP server via crafted `protectionAlg` (bsc#1274790).\n- CVE-2026-75803: AEAD forgeries with empty ciphertext when using `EVP_Cipher()` (bsc#1275837).\n","status":"published","published":"2026-09-02T15:59:12Z","modified":"2026-09-29T18:23:19.207612323Z","updated_at":"2026-11-02T15:54:03.991985Z"}]},"sources_more":{"osv":13}}