Artifex MuPDF 1.14.0 has a SEGV in the function fz_load_page of the fitz/document.c file, as demonstrated by mutool. This is related to page-number mishandling in cbz/mucbz.c, cbz/muimg.c, and svg/svg-doc.c.
https://lists.debian.org/debian-lts-announce/2020/07/msg00019.html
https://lists.debian.org/debian-lts-announce/2019/06/msg00027.html