adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4 does not check the init_get_bits return value, which is a necessary step because the second argument to init_get_bits can be crafted.
https://www.debian.org/security/2021/dsa-4998
https://www.debian.org/security/2021/dsa-4990
https://security.gentoo.org/glsa/202312-14
https://lists.debian.org/debian-lts-announce/2021/11/msg00012.html
https://github.com/FFmpeg/FFmpeg/commit/9ffa49496d1aae4cbbb387aac28a9e061a6ab0a6