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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
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OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | fixed | 3.5.2+dfsg-2 |
| debian | sid | fixed | 3.5.2+dfsg-2 |
| debian | trixie | fixed | 3.5.2+dfsg-1+deb13u1 |
References
- https://github.com/GreycLab/CImg/commit/c3aacf5b96ac1e54b7af1957c6737dbf3949f6d3
- https://github.com/GreycLab/CImg/issues/477
- https://github.com/GreycLab/CImg/releases/tag/v.3.7.5
- https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv
- https://security-tracker.debian.org/tracker/CVE-2026-42146
CWEs
CWE-789
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.