MEDIUM 4.8 NVD
CVE-2026-125095
FFmpeg through 9.0.2 contains an uninitialized memory use vulnerability in the C93 video decoder in libavcodec/c93.c, where decode_frame() never checks how many
FFmpeg through 9.0.2 contains an uninitialized memory use vulnerability in the C93 video decoder in libavcodec/c93.c, where decode_frame() never checks how many color table bytes were copied. Attackers can supply a crafted truncated Interplay C93 file so draw_n_color() writes uninitialized stack bytes into decoded frames, disclosing stack memory contents.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25715
- https://github.com/FFmpeg/FFmpeg
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/c93.c#L198
- https://github.com/FFmpeg/FFmpeg/commit/ac0106851a4dac555c967421dfc96c0135183133
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-c93-decoder-uninitialized-stack-
This medium severity vulnerability with a CVSS score of 4.8 was published on 2026-11-09 via NVD.
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