Description
In Libav 12.3, there is a heap-based buffer over-read in decode_frame in libavcodec/lcldec.c that allows an attacker to cause denial-of-service via a crafted avi 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 | 6:11.12-1~deb8u9 | DLA-2021-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libav | No fix yet | — |
Advisories 1
- DLA-2021-1 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026