Description
The decode_init function in kmvc.c in libavcodec in FFmpeg before 0.10 and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.6, and 0.8.x before 0.8.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a large palette size in a KMVC encoded file.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ffmpeg | 7:2.4.1-1 | — |
| Debian 13 | ffmpeg | 7:2.4.1-1 | — |
| Debian 12 | ffmpeg | 7:2.4.1-1 | — |
| Debian 6.0 | ffmpeg | 4:0.5.9-1 | DSA-2494-1 |
Advisories 1
- DSA-2494-1 ffmpeg - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-1479-1 vendor-advisory
- DSA-2494 vendor-advisory
- http://ffmpeg.org/
- http://git.libav.org/?p=libav.git%3Ba=commit%3Bh=386741f887714d3e46c9e8fe577e326a7964037b
- http://libav.org/