CVE-2025-52496
7.8
HIGH
CVSS 3.1
EPSS 0.08%
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.
How to fix CVE-2025-52496
To remediate CVE-2025-52496, upgrade the affected package to a fixed version below.
- Alpine/mbedtls—upgrade to 3.6.4-r0 or later
- Debian/mbedtls—upgrade to 2.16.9-0.1+deb11u2 or later
Is CVE-2025-52496 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.6.4-r0
- from 0, < 2.16.9-0.1+deb11u2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N |