A stack-based buffer under-read in htmldoc before 1.9.12, allows attackers to cause a denial of service via a crafted BMP image to image_load_bmp.
https://lists.debian.org/debian-lts-announce/2022/02/msg00022.html
https://github.com/michaelrsweet/htmldoc/issues/444
https://github.com/michaelrsweet/htmldoc/commit/f12b9666e582a8e7b70f11b28e5ffc49ad625d43