Description
The smka_decode_frame function in libavcodec/smacker.c in FFmpeg before 2.6.5, 2.7.x before 2.7.3, and 2.8.x through 2.8.2 does not verify that the data size is consistent with the number of channels, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted Smacker data.
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 | 7:2.8.3-1 | — |
| Debian 13 | ffmpeg | 7:2.8.3-1 | — |
| Debian 12 | ffmpeg | 7:2.8.3-1 | — |
| Debian 8 | libav | 6:11.11-1~deb8u1 | DSA-4012-1 |
| Debian 7 | libav | 6:0.8.21-0+deb7u1 | DLA-1142-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libav | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ffmpeg-4 | 4.4-5.2 | openSUSE-SU-2024:10754-1 |
Advisories 3
- DSA-4012-1 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1142-1 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10754-1 ffmpeg-4-4.4-5.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- openSUSE-SU-2015:2370 vendor-advisory
- USN-2944-1 vendor-advisory
- http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=4a9af07a49295e014b059c1ab624c40345af5892
- DSA-4012 vendor-advisory