LIBPNG is vulnerable to a heap buffer over-read in `png_write_image_8bit` with grayscale+alpha or RGB/RGBA images_CVE-2025-64506

{
    "lastseen": "",
    "description": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_write_image_8bit function when processing 8-bit images through the simplified write API with convert_to_8bit enabled. The vulnerability affects 8-bit grayscale+alpha, RGB/RGBA, and images with incomplete row data. A conditional guard incorrectly allows 8-bit input to enter code expecting 16-bit input, causing reads up to 2 bytes beyond allocated buffer boundaries. This issue has been patched in version 1.6.51.",
    "published": "2025-11-24T23:41:09.207Z",
    "modified": "2025-11-24T23:41:09.207Z",
    "type": "cve",
    "title": "LIBPNG is vulnerable to a heap buffer over-read in `png_write_image_8bit` with grayscale+alpha or RGB/RGBA images",
    "source": "GitHub_M",
    "references": "https://github.com/pnggroup/libpng/security/advisories/GHSA-qpr4-xm66-hww6\nhttps://github.com/pnggroup/libpng/pull/749\nhttps://github.com/pnggroup/libpng/commit/2bd84c019c300b78e811743fbcddb67c9d9bf821",
    "id": "CVE-2025-64506",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "pnggroup libpng >= 1.6.0, < 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": [],
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        "baseScore": 0,
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        "confidentialityImpact": "",
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        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "libpng",
    "version": ">= 1.6.0, < 1.6.51",
    "vendor": "pnggroup",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}