The (1) av_image_fill_pointers (2) vp5_parse_coeff and (3) vp6_parse_coeff functions in FFmpeg 0.5.x before 0.5.7 0.6.x before 0.6.4 0.7.x before 0.7.9 and 0.8.x before 0.8.8; and in Libav 0.5.x before 0.5.6 0.6.x before 0.6.4 and 0.7.x before 0.7.3 allow remote attackers to cause a denial of service (out-of-bounds read) via a crafted VP5 or VP6 stream.