A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21688
Reference (s):
- DEBIAN:DSA-4998
- URL: https://www.debian.org/security/2021/dsa-4998
- https://trac.ffmpeg.org/ticket/8186