The ff_get_buffer function in libavcodec/utils.c in FFmpeg before 2.8.4 preserves width and height values after a failure, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via a crafted .mov file.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 70.2%