CVE-2025-52496

EUVD-2025-20081
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
HIGH
NONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
armmbed_tls
𝑥
< 3.6.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
mbedtls
bookworm
vulnerable
bullseye
vulnerable
bullseye (security)
2.16.9-0.1+deb11u3
fixed
forky
3.6.5-0.1
fixed
sid
3.6.5-0.1
fixed
trixie
3.6.5-0.1~deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mbedtls
bionic
Fixed 2.8.0-1ubuntu0.1~esm1
released
focal
Fixed 2.16.4-1ubuntu2+esm1
released
jammy
Fixed 2.28.0-1ubuntu0.1~esm1
released
noble
Fixed 2.28.8-1ubuntu0.1~esm1
released
oracular
ignored
plucky
ignored
questing
needed
xenial
needed
Common Weakness Enumeration
References
https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-1.md
https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html
https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-1.md