CVE-2026-42144— CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)
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I. Basic Information for CVE-2026-42144
Vulnerability Information
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Vulnerability Title
CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Vulnerability Title
CImg 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CImg是GREYC开源的一个用于图像处理的小型开源 C++ 工具包。 CImg存在输入验证错误漏洞，该漏洞源于_load_pnm函数中W*H*D大小计算存在整数溢出，可能导致分配过小缓冲区并触发堆缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-42144
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- Release v.3.7.5 · GreycLab/CImg · GitHubx_refsource_MISC
- Fix #478. · GreycLab/CImg@4ca26bc · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-42144
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V. Comments for CVE-2026-42144
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