When decoding a frame for a SANM file (ANIM v0 variant), the decoded data can be larger than the buffer allocated for it.
Frames encoded with codec 48 can specify their resolution (width x height). A buffer of appropriate size is allocated depending on the resolution.
This codec can encode the frame contents using a run-length encoding algorithm. There are no checks that the decoded frame fits in the allocated buffer, leading to a heap-buffer-overflow.
process_frame_obj initializes the buffers based on the frame resolution:
We recommend upgrading to version 8.0 or beyond.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade ffmpeg | Dec 5, 2025 | Oct 6, 2025 |
| Ffmpeg | — | Upgrade to FFmpeg version 8.0 | Jul 20, 2026 | Oct 6, 2025 |
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