Buffer Overflow in Graphviz Graph Visualization Tools from commit ID f8b9e035 and earlier allows remote attackers to execute arbitrary code or cause a denial of service (application crash) by loading a crafted file into the "lib/common/shapes.c" component.
https://www.debian.org/security/2021/dsa-4914
https://security.gentoo.org/glsa/202107-04
https://lists.debian.org/debian-lts-announce/2021/05/msg00014.html