The codec_get_buffer function in ffmpeg.c in FFmpeg before 0.10 allows remote attackers to have an unspecified impact via vectors related to a crafted image size.
http://www.ffmpeg.org/security.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=668494acd8b20f974c7722895d4a6a14c1005f1e