SDL_image has a heap buffer overflow READ via unchecked colormap index in XCF loader_CVE-2026-35444

{
    "lastseen": "",
    "description": "SDL_image is a library to load images of various formats as SDL surfaces. In do_layer_surface() in src/IMG_xcf.c, pixel index values from decoded XCF tile data are used directly as colormap indices without validating them against the colormap size (cm_num). A crafted .xcf file with a small colormap and out-of-range pixel indices causes heap out-of-bounds reads of up to 762 bytes past the colormap allocation. Both IMAGE_INDEXED code paths are affected (bpp=1 and bpp=2). The leaked heap bytes are written into the output surface pixel data, making them potentially observable in the rendered image. This vulnerability is fixed with commit 996bf12888925932daace576e09c3053410896f8.",
    "published": "2026-04-06T21:44:05.986Z",
    "modified": "2026-04-08T14:06:28.528Z",
    "type": "cve",
    "title": "SDL_image has a heap buffer overflow READ via unchecked colormap index in XCF loader",
    "source": "GitHub_M",
    "references": "https://github.com/libsdl-org/SDL_image/security/advisories/GHSA-gq8w-x74c-h6p7",
    "id": "CVE-2026-35444",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "libsdl-org SDL_image < 996bf12888925932daace576e09c3053410896f8",
    "sourceHref": "",
    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "SDL_image",
    "version": "< 996bf12888925932daace576e09c3053410896f8",
    "vendor": "libsdl-org",
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}