CVE-2025-52496
HIGH
7.8
CVSS Score
Published: July 4, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 09:36 AM UTC
2 products affected across 2 vendorsmbed TLSMbedtls
Using mbedtls by Mbed?
Get instant alerts when new vulnerabilities affect mbedtls - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
PoC
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
ExploitThird Party Advisory
Source: [email protected]
https://github.com/Mbed-TLS/mbedtls-docs/blob/main/security-advisories/mbedtls-security-advisory-2025-06-1.mdSource: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/08/msg00013.htmlSSVC — Action Prioritization
SSVCPoCNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.8HIGHmitre
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-733
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card