mshv: Fix use-after-free in mshv_map_user_memory error path_CVE-2026-23432

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nmshv: Fix use-after-free in mshv_map_user_memory error path\n\nIn the error path of mshv_map_user_memory(), calling vfree() directly on\nthe region leaves the MMU notifier registered. When userspace later unmaps\nthe memory, the notifier fires and accesses the freed region, causing a\nuse-after-free and potential kernel panic.\n\nReplace vfree() with mshv_partition_put() to properly unregister\nthe MMU notifier before freeing the region.",
    "published": "2026-04-03T15:15:18.061Z",
    "modified": "2026-04-27T14:02:21.961Z",
    "type": "cve",
    "title": "mshv: Fix use-after-free in mshv_map_user_memory error path",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/34861bdc0c0196b6c2dd48f7454029407704ff6e\nhttps://git.kernel.org/stable/c/6922db250422a0dfee34de322f86b7a73d713d33",
    "id": "CVE-2026-23432",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux b9a66cd5ccbb9fade15d0e427e19470d8ad35b75\nLinux Linux b9a66cd5ccbb9fade15d0e427e19470d8ad35b75\nLinux Linux 6.19",
    "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": [],
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        "baseScore": 0,
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        "scope": "",
        "confidentialityImpact": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "b9a66cd5ccbb9fade15d0e427e19470d8ad35b75",
    "vendor": "Linux",
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    "ai_score": 0
}