Disclosure summary
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.
Source-reported weakness categories
CWE-733
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2025-Jul
Open original source · Updated Feb 17, 2026
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.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 7.8
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 qemu 8.2.0-17 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 qemu 6.2.0-24 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 qemu 6.2.0-24 on CBL Mariner 2.0 | (MSRC status code 3) |
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2025-09-03T19:18:31-04:00
MODIFIED 2026-02-17T20:21:15-05:00
INGESTED 2026-10-08T12:45:47-04:00