ffmpeg is vulnerable to out-of-bounds write because of errors in calculations of when to perform memset zero operations.
bugs.chromium.org/p/oss-fuzz/issues/detail?id=26532
github.com/FFmpeg/FFmpeg/commit/3e5959b3457f7f1856d997261e6ac672bba49e8b
github.com/FFmpeg/FFmpeg/commit/b0a8b40294ea212c1938348ff112ef1b9bf16bb3
lists.debian.org/debian-lts-announce/2021/01/msg00026.html
security-tracker.debian.org/tracker/CVE-2020-35965
security.gentoo.org/glsa/202105-24
www.debian.org/security/2021/dsa-4990