{"id":"CVE-2025-52496","aliases":["ALPINE-CVE-2025-52496","DEBIAN-CVE-2025-52496","DLA-4274-1","EUVD-2025-20081","GHSA-qc26-g9mm-wmmf","JLSEC-2025-228","ROOT-OS-DEBIAN-12-CVE-2025-52496","UBUNTU-CVE-2025-52496","USN-8123-1","openSUSE-SU-2026:11790-1","openSUSE-SU-2026:21144-1","openSUSE-SU-2026:21864-1"],"status":"published","title":"Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations...","description":"Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations occur. 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Advisory","advisory","web","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-52496","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qc26-g9mm-wmmf"},{"url":"https://security.alpinelinux.org/vuln/CVE-2025-52496","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52496.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-52496","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-52496","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-52496","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8123-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-44732","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2024-23775","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2025-27810","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2025-47917","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2025-48965","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2025-52497","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-52496","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-59438","tags":["web"]},{"url":"https://bugzilla.suse.com/1231708","tags":["report"]},{"url":"https://bugzilla.suse.com/1240051","tags":["report"]},{"url":"https://bugzilla.suse.com/1240052","tags":["report"]},{"url":"https://bugzilla.suse.com/1245808","tags":["report"]},{"url":"https://bugzilla.suse.com/1245809","tags":["report"]},{"url":"https://bugzilla.suse.com/1245810","tags":["report"]},{"url":"https://bugzilla.suse.com/1245811","tags":["report"]},{"url":"https://bugzilla.suse.com/1246783","tags":["report"]},{"url":"https://bugzilla.suse.com/1246784","tags":["report"]},{"url":"https://bugzilla.suse.com/1246973","tags":["report"]},{"url":"https://bugzilla.suse.com/1252341","tags":["report"]},{"url":"https://bugzilla.suse.com/1252454","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2024-49195","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-27809","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-27810","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-47917","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-48965","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-49087","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-49600","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-49601","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-52497","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-54764","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25833","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25834","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-25835","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2025-52496","description":"Mbed 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An attacker may be able to extract an AES key from a multithreaded program, or perform a GCM forgery.","status":"published","published":"2025-07-04T15:15:22.633Z","modified":"2026-09-01T20:05:53.692941667Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:47.378563Z"},{"id":"JLSEC-2025-228","title":"Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations...","description":"Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations occur. An attacker may be able to extract an AES key from a multithreaded program, or perform a GCM forgery.","status":"published","published":"2025-11-21T15:59:04.054Z","modified":"2026-07-23T22:30:11.906114174Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:47:17.805107Z"},{"id":"ROOT-OS-DEBIAN-12-CVE-2025-52496","title":"CVE-2025-52496 in mbedtls - Patched by Root","description":"Root has patched CVE-2025-52496 in the mbedtls package for Root:Debian:12. Multiple fixed versions available.","status":"published","published":"2026-08-25T12:15:34Z","modified":"2026-08-26T01:12:43.070701907Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:31.514195Z"},{"id":"UBUNTU-CVE-2025-52496","description":"Mbed TLS before 3.6.4 has a race condition in AESNI detection if certain compiler optimizations occur. An attacker may be able to extract an AES key from a multithreaded program, or perform a GCM forgery.","status":"published","published":"2025-07-04T15:15:00Z","modified":"2026-04-22T16:05:27.909978Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:55:50.31802Z"},{"id":"DLA-4274-1","title":"mbedtls - security update","status":"published","published":"2025-08-18T00:00:00Z","modified":"2026-03-09T02:10:41.619844Z","updated_at":"2026-11-02T15:46:12.7027Z"},{"id":"openSUSE-SU-2026:11790-1","title":"libmbedcrypto7-2.28.10-5.1 on GA media","description":"These are all security issues fixed in the libmbedcrypto7-2.28.10-5.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-09-15T00:00:00Z","modified":"2026-09-16T18:23:08.638351626Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"openSUSE-SU-2026:21144-1","title":"Security update for mbedtls","description":"This update for mbedtls fixes the following issues:\n\nChanges in mbedtls:\n\n- Update to 3.6.6 (LTS maintenance update from 3.6.1); security fixes\n  accumulated across the 3.6.2-3.6.6 releases:\n  * CVE-2024-49195 (boo#1231708): buffer underrun in pkwrite when\n    writing an opaque key pair\n  * CVE-2025-27809 (boo#1240051): certificate verification accepted\n    arbitrary hostnames\n  * CVE-2025-27810 (boo#1240052): possible authentication bypass on\n    failed memory allocation / hardware errors\n  * CVE-2025-47917 (boo#1246783): misleading memory management in\n    mbedtls_x509_string_to_names()\n  * CVE-2025-48965 (boo#1246784): NULL pointer dereference after\n    mbedtls_asn1_store_named_data()\n  * CVE-2025-49087 (boo#1246973): timing side channel in PKCS#7\n    padding removal\n  * CVE-2025-49600 (boo#1245808): unchecked return values in LMS\n    verification allow signature bypass via fault injection\n  * CVE-2025-49601 (boo#1245809): out-of-bounds read in\n    mbedtls_lms_import_public_key()\n  * CVE-2025-52496 (boo#1245810): race in AES-NI support detection can\n    lead to AES key extraction or GCM forgery\n  * CVE-2025-52497 (boo#1245811): one-byte heap underflow when parsing\n    PEM-encrypted material\n  * CVE-2025-54764 (boo#1252341): timing attacks in RSA operations\n  * CVE-2025-59438 (boo#1252454): padding-oracle attack via timing of\n    cipher error reporting\n  * CVE-2026-25833: PSA RNG state duplicated across fork()\n  * CVE-2026-25834: TLS 1.3 HelloRetryRequest man-in-the-middle\n    session-resumption downgrade\n  * CVE-2026-25835: RNG state duplicated when application/VM state is\n    cloned\n","status":"published","published":"2026-06-22T13:34:13Z","modified":"2026-06-30T18:24:45.186057867Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"openSUSE-SU-2026:21864-1","title":"Security update for mbedtls-2","description":"This update for mbedtls-2 fixes the following issues:\n\nChanges in mbedtls-2:\n\n- CVE-2025-52496: race condition in AESNI support detection, AES key\n  disclosure / GCM forgery in multithreaded programs (boo#1245810)\n- CVE-2025-59438: padding oracle through timing of cipher error\n  reporting (boo#1252454)\n","status":"published","published":"2026-09-16T15:11:09Z","modified":"2026-09-17T18:23:15.811634995Z","updated_at":"2026-11-02T16:58:42.426393Z"},{"id":"USN-8123-1","title":"mbedtls vulnerabilities","description":"It was discovered that Mbed TLS incorrectly handled memory allocation\nfailures. A remote attacker could possibly use this issue to crash\nthe program. This issue only affected Ubuntu 18.04 LTS and Ubuntu\n20.04 LTS. (CVE-2021-44732)\n\nJonathan Winzig discovered that Mbed TLS incorrectly handled crafted\ninputs. A remote attacker could possibly use this issue to crash the\nprogram, resulting in a denial of service. This issue only affected\nUbuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS. (CVE-2024-23775)\n\nIt was discovered that Mbed TLS incorrectly handled the TLS\nhandshake. A remote attacker could possibly use this issue to\nbreak the security guarantees of the TLS handshake.\n(CVE-2025-27810)\n\nLinh Le and Ngan Nguyen discovered that Mbed TLS incorrectly\ndocumented the behavior of a function. Application code relying\non the documented behavior might be affected. A remote attacker\ncould possibly use this issue to execute arbitrary code.\n(CVE-2025-47917)\n\nLinh Le and Ngan Nguyen discovered that Mbed TLS incorrectly handled\ncrafted input. A remote attacker could possibly use this issue to\ncrash the program, resulting in a denial of service. (CVE-2025-48965)\n\nIt was discovered that Mbed TLS incorrectly handled a race condition.\nAn attacker could possibly use this issue to extract AES keys.\n(CVE-2025-52496)\n\nLinh Le and Ngan Nguyen discovered that Mbed TLS incorrectly handled\ncertain invalid input. A remote attacker could possibly use this\nissue to crash the program, resulting in a denial of service.\n(CVE-2025-52497)","status":"published","published":"2026-03-25T16:22:11Z","modified":"2026-04-27T18:44:30.29713Z","updated_at":"2026-11-02T16:58:22.951676Z"}]}}