The dirac_decode_data_unit function in libavcodec/diracdec.c in FFmpeg before 0.10 allows remote attackers to have an unspecified impact via a crafted value in the reference pictures number.
http://www.ffmpeg.org/security.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=ddf0c1d86ad8e1df5ab3265206aef493a1bdc813