CVE-2026-125219 FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VDPAU Tile Arrays

High 7.3 Published 9 Nov 2026 Updated 10 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-125219?

CVE-2026-125219 is a high-severity vulnerability in FFmpeg, published on 9 Nov 2026.

Official description

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vdpau_hevc_start_frame() in libavcodec/vdpau_hevc.c that copies unbounded PPS tile counts into fixed-size VDPAU arrays. Attackers can supply crafted HEVC bitstreams with excessive tile columns or rows to write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory in applications using VDPAU decoding.

Weakness: CWE-787

Which versions are affected by CVE-2026-125219?

How do I fix CVE-2026-125219?

No fix has been published for CVE-2026-125219 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-125219 being exploited?

There is no known exploitation of CVE-2026-125219 in the wild and no public exploit code.

Sources

Also known as GHSA-q3xq-h42f-cj6f, UBUNTU-CVE-2026-125219.