Description
The sws_init_context function in libswscale/utils.c in FFmpeg before 2.7.2 does not initialize certain pixbuf data structures, which allows remote attackers to cause a denial of service (segmentation violation) or possibly have unspecified other impact via crafted video 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 | 7:2.7.2-1 | — |
| Debian 13 | ffmpeg | 7:2.7.2-1 | — |
| Debian 12 | ffmpeg | 7:2.7.2-1 | — |
| Debian 8 | libav | 6:11.12-1~deb8u3 | DLA-1611-2 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libav | No fix yet | — |
Advisories 1
- DLA-1611-2 libav - security update Debian Security (DSA / DLA) · Mar 9, 2026