Vulnerability 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.
CVSS Score
7.8
HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Arm | Mbed Tls | < 3.6.4 |
Related Weaknesses (CWE)
References
- https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-sExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/08/msg00013.html
- https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-sExploitThird Party Advisory
FAQ
What is CVE-2025-52496?
CVE-2025-52496 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 forg...
How severe is CVE-2025-52496?
CVE-2025-52496 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-52496?
Check the references section above for vendor advisories and patch information. Affected products include: Arm Mbed Tls.