Off-by-one error in libavcodec/smc.c in FFmpeg before 2.4.2 allows remote attackers to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via crafted Quicktime Graphics (aka SMC) video data.
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=c727401aa9d62335e89d118a5b4e202edf39d905
http://www.ffmpeg.org/security.html