mapping0_forward in mapping0.c in Xiph.Org libvorbis 1.3.6 does not validate the number of channels, which allows remote attackers to cause a denial of service (heap-based buffer overflow or over-read) or possibly have unspecified other impact via a crafted file.
https://security.gentoo.org/glsa/202003-36
https://lists.debian.org/debian-lts-announce/2021/11/msg00023.html
https://lists.debian.org/debian-lts-announce/2019/11/msg00031.html