CVE-2026-125172 FFmpeg through 9.0.2 Out-of-Bounds Read via libxevd EVC NAL Length

Medium 6.9 Published 9 Nov 2026 Updated 10 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-125172?

CVE-2026-125172 is a medium-severity vulnerability in FFmpeg, published on 9 Nov 2026.

Official description

FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in libxevd_receive_frame() in libavcodec/libxevd.c that fails to validate NAL unit length prefixes against remaining packet data. Attackers can supply crafted EVC media with oversized 4-byte NAL length prefixes, causing libxevd to read past the packet buffer, crashing the application or exposing adjacent heap memory.

Weakness: CWE-125

Which versions are affected by CVE-2026-125172?

How do I fix CVE-2026-125172?

No fix has been published for CVE-2026-125172 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-125172 being exploited?

There is no known exploitation of CVE-2026-125172 in the wild and no public exploit code.

Sources

Also known as GHSA-rq3r-c7p7-5285, UBUNTU-CVE-2026-125172.