The decode_uncompressed function in libavcodec/faxcompr.c in FFmpeg before 2.8.2 does not validate uncompressed runs, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted CCITT FAX data.
http://lists.opensuse.org/opensuse-updates/2015-11/msg00146.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=d4a731b84a08f0f3839eaaaf82e97d8d9c67da46