libavcodec/dnxhddec.c in FFmpeg 4.4 does not check the return value of the init_vlc function, a similar issue to CVE-2013-0868.
https://www.debian.org/security/2021/dsa-4998
https://www.debian.org/security/2021/dsa-4990
https://lists.debian.org/debian-lts-announce/2021/08/msg00018.html
https://github.com/FFmpeg/FFmpeg/commit/7150f9575671f898382c370acae35f9087a30ba1