Xfig fig2dev 3.2.7a has a stack-based buffer overflow in the calc_arrow function in bound.c.
https://sourceforge.net/p/mcj/tickets/52/
https://lists.debian.org/debian-lts-announce/2020/01/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00043.html