fig2dev 3.2.7b contains a global buffer overflow in the conv_pattern_index function in gencgm.c.
https://sourceforge.net/p/mcj/tickets/63/
https://lists.debian.org/debian-lts-announce/2023/01/msg00044.html
https://lists.debian.org/debian-lts-announce/2021/10/msg00002.html