fs: afs: revert mmap_prepare() change_CVE-2026-46100

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: afs: revert mmap_prepare() change\n\nPartially reverts commit 9d5403b1036c (\"fs: convert most other\ngeneric_file_*mmap() users to .mmap_prepare()\").\n\nThis is because the .mmap invocation establishes a refcount, but\n.mmap_prepare is called at a point where a merge or an allocation failure\nmight happen after the call, which would leak the refcount increment.\n\nFunctionality is being added to permit the use of .mmap_prepare in this\ncase, but in the interim, we need to fix this.",
    "published": "2026-05-27T12:59:06.853Z",
    "modified": "2026-05-30T10:47:30.981Z",
    "type": "cve",
    "title": "fs: afs: revert mmap_prepare() change",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/f51f85c044809fbd39ac8ae07ac99bc43ce32bd5\nhttps://git.kernel.org/stable/c/48c7a0eaeea41da17d1d84d2d7a4c40be122b246\nhttps://git.kernel.org/stable/c/fbfc6578eaca12daa0c09df1e9ba7f2c657b49da",
    "id": "CVE-2026-46100",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 9d5403b1036cdcd4be0f9f5568612c0e60e73d79\nLinux Linux 9d5403b1036cdcd4be0f9f5568612c0e60e73d79\nLinux Linux 9d5403b1036cdcd4be0f9f5568612c0e60e73d79\nLinux Linux 6.17",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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": "",
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            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "9d5403b1036cdcd4be0f9f5568612c0e60e73d79",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}