An issue was discovered in CImg v.220. A heap-based buffer over-read in load_bmp in CImg.h occurs when loading a crafted bmp image, a different vulnerability than CVE-2018-7588. This is in a "32 bits colors" case, aka case 32.
https://lists.debian.org/debian-lts-announce/2020/10/msg00033.html
https://lists.debian.org/debian-lts-announce/2019/09/msg00030.html