libheif has Potential Heap Buffer Over-Read_CVE-2025-68431

{
    "lastseen": "",
    "description": "libheif is an HEIF and AVIF file format decoder and encoder. Prior to version 1.21.0, a crafted HEIF that exercises the overlay image item path triggers a heap buffer over-read in `HeifPixelImage::overlay()`. The function computes a negative row length (likely from an unclipped overlay rectangle or invalid offsets), which then underflows when converted to `size_t` and is passed to `memcpy`, causing a very large read past the end of the source plane and a crash. Version 1.21.0 contains a patch. As a workaround, avoid decoding images using `iovl` overlay boxes.",
    "published": "2025-12-29T19:09:54.628Z",
    "modified": "2025-12-29T19:09:54.628Z",
    "type": "cve",
    "title": "libheif has Potential Heap Buffer Over-Read",
    "source": "GitHub_M",
    "references": "https://github.com/strukturag/libheif/security/advisories/GHSA-j87x-4gmq-cqfq\nhttps://github.com/strukturag/libheif/commit/b8c12a7b70f46c9516711a988483bed377b78d46\nhttps://github.com/strukturag/libheif/releases/tag/v1.21.0",
    "id": "CVE-2025-68431",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125",
        "CWE-190"
    ],
    "cvelist": null,
    "sourceData": "strukturag libheif < 1.21.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "libheif",
    "version": "< 1.21.0",
    "vendor": "strukturag",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}