The adpcm_decode_frame function in adpcm.c in libavcodec in FFmpeg before 0.9.1 and in Libav 0.5.x before 0.5.9, 0.6.x before 0.6.6, 0.7.x before 0.7.6, and 0.8.x before 0.8.3 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via an ADPCM file with the number of channels not equal to two.
ffmpeg.org/security.html
git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=608708009f69ba4cecebf05120c696167494c897
libav.org/
www.debian.org/security/2012/dsa-2494
www.openwall.com/lists/oss-security/2012/02/14/4
www.ubuntu.com/usn/USN-1479-1
exchange.xforce.ibmcloud.com/vulnerabilities/78932
ffmpeg.org/trac/ffmpeg/ticket/794