MEDIUM 4.8 NVD
CVE-2026-125176
FFmpeg through 9.0.2 contains an uninitialized memory read vulnerability in decode_hybrid() in libavcodec/flashsv.c that reads past decompressed data when decod
FFmpeg through 9.0.2 contains an uninitialized memory read vulnerability in decode_hybrid() in libavcodec/flashsv.c that reads past decompressed data when decoding 15-bit color pixels. Attackers can supply a crafted Flash Screen Video 2 block whose inflated data ends mid-pixel to leak heap memory into decoded output frames.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24474
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/flashsv.c#L89
- https://github.com/FFmpeg/FFmpeg/commit/16d0f7f408ba47b4091a22109d4f22f5fd57820a
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-read-in-fla
This medium severity vulnerability with a CVSS score of 4.8 was published on 2026-11-09 via NVD.
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