{"id":"CVE-2021-45451","aliases":["EUVD-2021-32222","GHSA-2grh-pj67-4p6p","JLSEC-2025-216","UBUNTU-CVE-2021-45451"],"status":"published","title":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption...","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00954,"percentile":0.61614,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-327"],"published":"2021-12-21T00:00:00Z","modified":"2026-10-20T10:55:07Z","fixes":[{"ecosystem":"Julia","package":"MbedTLS_jll","fixed_in":["2.28.0+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Julia","package":"MbedTLS_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.28.0+0"}]}]}],"products":[{"vendor":"arm","product":"mbed_tls"},{"vendor":"fedoraproject","product":"fedora"}],"references":[{"url":"https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0","tags":["x_transferred","Patch","Release Notes","Third Party Advisory","fix","web","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-45451"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5/"},{"url":"https://github.com/advisories/GHSA-2grh-pj67-4p6p"},{"url":"https://ubuntu.com/security/CVE-2021-45451","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-45451","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-45451","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2021-12-21T00:00:00Z","modified":"2024-08-04T04:39:20.702Z","updated_at":"2026-11-02T14:33:02.580561Z"}],"euvd":[{"id":"EUVD-2021-32222","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2021-12-21T00:00:00Z","modified":"2024-08-04T04:39:20Z","updated_at":"2026-11-03T03:08:27.448176Z"}],"ghsa":[{"id":"GHSA-2grh-pj67-4p6p","title":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption...","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2021-12-22T00:00:50Z","modified":"2023-02-02T05:05:22Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:52:06.092141Z"}],"nvd":[{"id":"CVE-2021-45451","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2021-12-21T07:15:06.86Z","modified":"2026-06-17T04:13:23.707Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T14:07:02.566991Z"}],"osv":[{"id":"CVE-2021-45451","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2021-12-21T07:15:06.86Z","modified":"2026-10-20T10:55:07.623074367Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:22.18434Z"},{"id":"JLSEC-2025-216","title":"In Mbed TLS before 3.1.0, `psa_aead_generate_nonce` allows policy bypass or oracle-based decryption...","description":"In Mbed TLS before 3.1.0, `psa_aead_generate_nonce` allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"published","published":"2025-11-21T15:59:04.054Z","modified":"2026-07-23T22:30:17.63645281Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:47:17.805107Z"},{"id":"UBUNTU-CVE-2021-45451","description":"In Mbed TLS before 3.1.0, psa_aead_generate_nonce allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.","status":"withdrawn","published":"2021-12-21T07:15:00Z","modified":"2025-10-10T15:01:28Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:54:30.277322Z"}]}}