Description
The decode_residual function in libavcodec in libav 9.21 allows remote attackers to cause a denial of service (buffer over-read) or obtain sensitive information from process memory via a crafted h264 video 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 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 | — |
Advisories 2
- 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
References
- 97005 vdb-entry
- https://bugzilla.libav.org/show_bug.cgi?id=1000
- DSA-4012 vendor-advisory