Description
The flashsv_decode_frame function in libavcodec/flashsv.c in FFmpeg before 2.1 does not properly validate a certain height value, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted Flash Screen 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 | 7:2.4.1-1 | — |
| Debian 13 | ffmpeg | 7:2.4.1-1 | — |
| Debian 12 | ffmpeg | 7:2.4.1-1 | — |
| Debian 7 | libav | 6:0.8.10-1 | DSA-2855-1 |
Advisories 1
- DSA-2855-1 libav - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://trac.ffmpeg.org/ticket/2844
- DSA-2855 vendor-advisory
- GLSA-201603-06 vendor-advisory
- http://ffmpeg.org/security.html
- [oss-security] 20131208 Re: CVE Request: FFmpeg 2.1 multiple problems mailing-list
- [oss-security] 20131126 CVE Request: FFmpeg 2.1 multiple problems mailing-list
- https://github.com/FFmpeg/FFmpeg/commit/880c73cd76109697447fbfbaa8e5ee5683309446