CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)_CVE-2026-42144

{
    "lastseen": "",
    "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.",
    "published": "2026-05-04T17:51:38.144Z",
    "modified": "2026-05-04T17:51:38.144Z",
    "type": "cve",
    "title": "CImg Library: Integer overflow in PNM size check bypasses memory guard (_load_pnm)",
    "source": "GitHub_M",
    "references": "https://github.com/GreycLab/CImg/security/advisories/GHSA-4663-63fm-44gc\nhttps://github.com/GreycLab/CImg/issues/478\nhttps://github.com/GreycLab/CImg/commit/4ca26bce4d8c61fcd1507d5f9401b9fb1222c27d\nhttps://github.com/GreycLab/CImg/releases/tag/v.3.7.5",
    "id": "CVE-2026-42144",
    "bulletinFamily": "",
    "cwe": [
        "CWE-190"
    ],
    "cvelist": null,
    "sourceData": "GreycLab CImg < 4ca26bce4d8c61fcd1507d5f9401b9fb1222c27d",
    "sourceHref": "",
    "cvss": {
        "score": 6.1,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
        "version": "3.1"
    },
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        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "CImg",
    "version": "< 4ca26bce4d8c61fcd1507d5f9401b9fb1222c27d",
    "vendor": "GreycLab",
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}