The msrle_decode_pal4 function in msrledec.c in Libav
before 10.7 and 11.x before 11.4 and FFmpeg before 2.0.7,
2.2.x before 2.2.15, 2.4.x before 2.4.8, 2.5.x before 2.5.6,
and 2.6.x before 2.6.2 allows remote attackers to have
unspecified impact via a crafted image, related to a pixel
pointer, which triggers an out-of-bounds array access.