CVE-2026-42144: medium-severity vulnerability in GreycLab CImg
CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 0.1%
CImg Library is a C++ library for image processing. Prior to commit 4ca26bc, there is an integer overflow vulnerability in the W*H*D size computation inside _load_pnm() that can bypass the memory allocation guard. A crafted PNM/PGM/PPM file with large dimension values causes the overflow to wrap around, allocating an undersized buffer and potentially triggering a heap buffer overflow. Any application using CImg to load untrusted image files is affected. This issue has been patched via commit 4ca26bc.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/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-2026-42146MEDIUMCImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmpEPSS 0.2%CVE-2026-117555MEDIUMGreycLab CImg through 4.0.6 Heap Out-of-Bounds Read via Integer Overflow in _load_bmp()EPSS 0.1%