CVE-2026-125261
FFmpeg through 9.0.2 SGI Encoder Out-of-Bounds Read via sgienc.c
FFmpeg through 9.0.2 contains an out-of-bounds read vulnerability in the SGI encoder's encode_frame() in libavcodec/sgienc.c, where unsigned size variables mis-handle negative linesize frames. Attackers can supply a video whose display matrix triggers autorotate vflip, so transcoding to SGI images reads pixel data far outside the frame and crashes the process.
Public vulnerability details
- Record state
- Published
- Published (UTC)
- Last updated (UTC)
- Assigned by
- VulnCheck
- CVSS score
- 6.9 (CVSS v4.0, from VulnCheck)
- Severity
- MEDIUM
- CISA KEV
- No KEV entry in this record. This does not show that the CVE is absent from the KEV catalog.
- Additional data from
- None
FHE assessment
No FHE assessment is available in this application yet. This does not mean FHE cannot mitigate an impact of this CVE.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25690 (VulnCheck)
- Patch Commit (VulnCheck)
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/sgienc.c#L208 (VulnCheck)
- https://github.com/FFmpeg/FFmpeg (VulnCheck)
- VulnCheck Advisory: FFmpeg through 9.0.2 SGI Encoder Out-of-Bounds Read via sgienc.c (VulnCheck)
Source
CVE JSON 5.2 record from the CVE List archive 2026-11-09_delta_CVEs_at_end_of_day.zip, which covers changes through . Imported .