CVE-2026-125184

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25716 ↗
• https://github.com/FFmpeg/FFmpeg/commit/e58c4eb98f0f3c0523089fb9d037eedfcbd204d9 ↗
• https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/cscd.c#L152 ↗
• https://github.com/FFmpeg/FFmpeg ↗
• https://www.vulncheck.com/advisories/ffmpeg-6.1-through-9.0.2-information-disclosure-via-camstudio-decoder-cscd-c ↗