CVE-2026-125095
FFmpeg through 9.0.2 C93 Decoder Uninitialized Stack Memory Disclosure
CVSS Score
3.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-908 |
| Vendor | ffmpeg |
| Product | ffmpeg |
| Published | Nov 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
FFmpeg / FFmpeg
0 ≤ 9.0.2
References
code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25715 github.com: https://github.com/FFmpeg/FFmpeg/commit/ac0106851a4dac555c967421dfc96c0135183133 github.com: https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/c93.c#L198 github.com: https://github.com/FFmpeg/FFmpeg vulncheck.com: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-c93-decoder-uninitialized-stack-memory-disclosure
Credits
Joshua Rogers (AISLE Research) Michael Niedermayer