LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index_CVE-2025-64505

{
    "lastseen": "",
    "description": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. This issue has been patched in version 1.6.51.",
    "published": "2025-11-24T23:38:40.405Z",
    "modified": "2025-11-24T23:38:40.405Z",
    "type": "cve",
    "title": "LIBPNG is vulnerable to a heap buffer overflow in `png_do_quantize` via malformed palette index",
    "source": "GitHub_M",
    "references": "https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42\nhttps://github.com/pnggroup/libpng/pull/748\nhttps://github.com/pnggroup/libpng/commit/6a528eb5fd0dd7f6de1c39d30de0e41473431c37",
    "id": "CVE-2025-64505",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "pnggroup libpng < 1.6.51",
    "sourceHref": "",
    "cvss": {
        "score": 6.1,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "libpng",
    "version": "< 1.6.51",
    "vendor": "pnggroup",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}