CVE-2026-125184 FFmpeg 6.1 through 9.0.2 Information Disclosure via CamStudio Decoder cscd.c

Medium 4.8 Published 9 Nov 2026 Updated 10 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-125184?

CVE-2026-125184 is a medium-severity vulnerability in FFmpeg, published on 9 Nov 2026.

Official description

FFmpeg 6.1 through 9.0.2 contains an information disclosure vulnerability in the CamStudio decoder (libavcodec/cscd.c) that copies uninitialized heap memory into decoded frames when decompressed payloads are short. Attackers can supply a crafted AVI with a CSCD stream whose LZO or zlib frames decompress to fewer bytes than the frame size, recovering heap contents from the decoded or re-encoded output.

Weakness: CWE-908

Which versions are affected by CVE-2026-125184?

How do I fix CVE-2026-125184?

No fix has been published for CVE-2026-125184 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-125184 being exploited?

There is no known exploitation of CVE-2026-125184 in the wild and no public exploit code.

Sources

Also known as GHSA-x9w9-8w76-gp9h, UBUNTU-CVE-2026-125184.