Libav vulnerabilities

The ff_free_picture_tables function in libavcodec/mpegpicture.c in Libav 12.2 allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted file.

The ff_vc1_mc_4mv_chroma4 function in libavcodec/vc1_mc.c in Libav 12.2 allows remote attackers to cause a denial of service (segmentation fault and application crash) or possibly have unspecified other impact via a crafted file.

In Libav through 11.11 and 12.x through 12.1, the smacker_decode_tree function in libavcodec/smacker.c does not properly restrict tree recursion, allowing remote attackers to cause a denial of service via a crafted Smacker stream.

There is an illegal address access in the build_table function in libavcodec/bitstream.c of Libav 12.1 that may lead to remote denial of service via crafted input.

There is a heap-based buffer overflow in the function hpel_motion in mpegvideo_motion.c in libav 12.1. A crafted input can lead to a remote denial of service attack.

Multiple unspecified vulnerabilities in Libav before version 0.8.12 may allow remote attackers to achieve unknown impact and vectors.

Libav versions before 12.1 are vulnerable to an invalid read of size 1 due to NULL pointer dereferencing in the nsv_read_chunk function in libavformat/nsvdec.c.