CVE-2026-42144

Description

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 Vector

References

• https://github.com/GreycLab/CImg/commit/4ca26bce4d8c61fcd1507d5f9401b9fb1222c27d
• https://github.com/GreycLab/CImg/issues/478
• https://github.com/GreycLab/CImg/releases/tag/v.3.7.5
• https://github.com/GreycLab/CImg/security/advisories/GHSA-4663-63fm-44gc