CVE-2026-42146

Name	CVE-2026-42146
Description	CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1135778

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
cimg (PTS)	bullseye	2.9.4+dfsg-2	vulnerable
	bookworm	3.2.1+dfsg-1	vulnerable
	forky, trixie	3.5.2+dfsg-1	vulnerable
	sid	3.5.2+dfsg-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
cimg	source	(unstable)	3.5.2+dfsg-2			1135778

Notes

[trixie] - cimg <no-dsa> (Minor issue)
[bookworm] - cimg <no-dsa> (Minor issue)
https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv
https://github.com/GreycLab/CImg/issues/477
Fixed by: https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3 (v3.7.5)