procfs: fix possible double mmput() in do_procmap_query()_CVE-2026-43178

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: fix possible double mmput() in do_procmap_query()\n\nWhen user provides incorrectly sized buffer for build ID for PROCMAP_QUERY\nwe return with -ENAMETOOLONG error.  After recent changes this condition\nhappens later, after we unlocked mmap_lock/per-VMA lock and did mmput(),\nso original goto out is now wrong and will double-mmput() mm_struct.  Fix\nby jumping further to clean up only vm_file and name_buf.",
    "published": "2026-05-06T11:27:51.524Z",
    "modified": "2026-05-08T12:40:59.592Z",
    "type": "cve",
    "title": "procfs: fix possible double mmput() in do_procmap_query()",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/f9fe092084cd04deea18747f58a2304026e76aaa\nhttps://git.kernel.org/stable/c/8adaff87db143583e08eec4f4e7788f1ef8af94d\nhttps://git.kernel.org/stable/c/90f5e87c9b75833b9ef3a4415b92c0247f28ab2f\nhttps://git.kernel.org/stable/c/61dc9f776705d6db6847c101b98fa4f0e9eb6fa3",
    "id": "CVE-2026-43178",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux b9b97e6aeb534315f9646b2090d1a5024c6a4e82\nLinux Linux cbc03ce3e6ce7e21214c3f02218213574c1a2d08\nLinux Linux b5cbacd7f86f4f62b8813688c8e73be94e8e1951\nLinux Linux b5cbacd7f86f4f62b8813688c8e73be94e8e1951\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,
        "baseSeverity": "",
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        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "b9b97e6aeb534315f9646b2090d1a5024c6a4e82",
    "vendor": "Linux",
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    "ai_score": 0
}