MEDIUM 4.8 NVD
CVE-2026-125190
FFmpeg through 9.0.2 contains an information disclosure vulnerability in decode_mvc2() in libavcodec/mvcdec.c that leaks uninitialized stack memory through unch
FFmpeg through 9.0.2 contains an information disclosure vulnerability in decode_mvc2() in libavcodec/mvcdec.c that leaks uninitialized stack memory through unchecked palette indices. Attackers can supply a crafted MVC2 stream declaring few colors but referencing higher palette indices, copying process stack contents into decoded RGB frames.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25278
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/mvcdec.c#L141
- https://github.com/FFmpeg/FFmpeg/commit/3a5eb948e76dc6390e4b3cff7becf84bc492b7af
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-stack-memory-discl
This medium severity vulnerability with a CVSS score of 4.8 was published on 2026-11-09 via NVD.
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