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 Monochrome case, aka case 1.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-7640.json"