Vulnerability · Published Jul 4, 2025 · Assigned by mitre
CVE-2025-52496
High 7.8
In plain English
A high-severity security flaw in mbedtls from Mbed. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 88.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | mbedtls | 3.6.4-r0 | ALPINE-CVE-2025-52496 |
| Alpine:v3.21 | mbedtls | 3.6.4-r0 | ALPINE-CVE-2025-52496 |
| Alpine:v3.22 | mbedtls | 3.6.4-r0 | ALPINE-CVE-2025-52496 |
| Alpine:v3.23 | mbedtls | 3.6.4-r0 | ALPINE-CVE-2025-52496 |
| Alpine:v3.24 | mbedtls | 3.6.4-r0 | ALPINE-CVE-2025-52496 |
| Alpine:v3.24 | mbedtls3 | 3.6.4-r0 | ALPINE-CVE-2025-52496 |
| Debian:12 | mbedtls | no fix listed | DEBIAN-CVE-2025-52496 |
| Debian:13 | mbedtls | 3.6.4-1 | DEBIAN-CVE-2025-52496 |
| Debian:14 | mbedtls | 3.6.4-1 | DEBIAN-CVE-2025-52496 |
| Ubuntu:25.10 | mbedtls | no fix listed | UBUNTU-CVE-2025-52496 |
Affected products (as reported)
Weakness: CWE-733 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N