system
Describe <CVE-2013-7021>.
user
What is <CVE-2013-7021>?
assistant
The filter_frame function in libavfilter/vf_fps.c in FFmpeg before 2.1 does not properly ensure the availability of FIFO content, which allows remote attackers to cause a denial of service (double free) or possibly have unspecified other impact via crafted data..