The parse_picture_segment function in libavcodec/pgssubdec.c in FFmpeg before 1.1 allows remote attackers to have an unspecified impact via crafted RLE data, which triggers an out-of-bounds array access.
http://www.mandriva.com/security/advisories?name=MDVSA-2014:227
http://www.ffmpeg.org/security.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=c0d68be555f5858703383040e04fcd6529777061