A vulnerability in EbmlTypeDispatcher::send in VideoLAN VLC media player 3.0.11 allows attackers to trigger a heap-based buffer overflow via a crafted .mkv file.
https://www.debian.org/security/2021/dsa-4834
https://security.gentoo.org/glsa/202101-37
https://lists.debian.org/debian-lts-announce/2022/06/msg00012.html