CVE-2026-125235 FFmpeg through 9.0.2 Heap Overflow via QSV Encoder submit_frame()
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-125235?
CVE-2026-125235 is a high-severity vulnerability in FFmpeg, published on 9 Nov 2026.
Official description
FFmpeg through 9.0.2 contains a heap overflow vulnerability in libavcodec/qsvenc.c that allows attackers to corrupt memory by reusing an undersized pooled QSVFrame buffer when input dimensions increase. Attackers can supply crafted input whose resolution grows mid-stream, transcoded with Intel Quick Sync encoders without rescaling, to crash the application or corrupt heap memory.
Weakness: CWE-122
Which versions are affected by CVE-2026-125235?
How do I fix CVE-2026-125235?
No fix has been published for CVE-2026-125235 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-125235 being exploited?
There is no known exploitation of CVE-2026-125235 in the wild and no public exploit code.
Sources
Also known as GHSA-rfcc-vr3x-qcq9, UBUNTU-CVE-2026-125235.