The roq_decode_init function in libavcodec/roqvideodec.c in FFmpeg before 1.1 allows remote attackers to have an unspecified impact via a crafted (1) width or (2) height dimension that is not a multiple of sixteen in id RoQ video data.
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.