CVE-2026-42146: medium-severity vulnerability in GreycLab CImg
CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.2%
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected products
GreycLab · CImgRelated CVEs — GreycLab CImg
In the same product, most dangerous first.
CVE-2026-47667HIGHCImg Library: Uncontrolled Memory Allocation and Memory Leak in `_load_analyze()` via Crafted NIfTI/Analyze HeaderEPSS 0.5%CVE-2026-42144MEDIUMCImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)EPSS 0.1%CVE-2026-117555MEDIUMGreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()EPSS 0.1%