The avcodec_decode_audio4 function in libavcodec/utils.c in FFmpeg before 1.0.4 and 1.1.x before 1.1.1 allows remote attackers to trigger memory corruption via vectors related to the channel layout.
https://security.gentoo.org/glsa/201603-06
http://www.ffmpeg.org/security.html
http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=4cd1dad91ae97fe1f0dd534c3f5566787566f137
http://git.videolan.org/?p=ffmpeg.git%3Ba=commitdiff%3Bh=43c6b45a53a186a187f7266e4d6bd3c2620519f1