Double free vulnerability in the mpeg_decode_frame function in libavcodec/mpeg12.c in FFmpeg before 0.11, and Libav 0.7.x before 0.7.7 and 0.8.x before 0.8.5, has unknown impact and attack vectors, related to resetting the data size value.
Exploitability
AV:NAC:LAu:NImpact
C:CI:CA:C10/AV:N/AC:L/Au:N/C:C/I:C/A:C