misc: fastrpc: fix use-after-free race in fastrpc_map_create_CVE-2026-53160

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: fastrpc: fix use-after-free race in fastrpc_map_create\n\nfastrpc_map_lookup returns a raw pointer after releasing fl->lock. The\ncaller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero)\non this unprotected pointer. A concurrent MEM_UNMAP can free the map\nbetween the lock release and the kref operation, resulting in a\nuse-after-free on the freed slab object.\n\nRestore the take_ref parameter to fastrpc_map_lookup so the reference\nis acquired atomically under fl->lock before the pointer is exposed to\nthe caller.",
    "published": "2026-06-25T08:38:42.138Z",
    "modified": "2026-06-28T06:39:36.143Z",
    "type": "cve",
    "title": "misc: fastrpc: fix use-after-free race in fastrpc_map_create",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962\nhttps://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c\nhttps://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532\nhttps://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218\nhttps://git.kernel.org/stable/c/f20f6512ecb75c816e0debf4551a138f098615c4\nhttps://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb",
    "id": "CVE-2026-53160",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 0b70ec82b309a4093106ff399da1911ad23b52d3\nLinux Linux d7513b47082c08105e837b06cebeb3f07a5fa56f\nLinux Linux 802359a52676176b18713e33caa17572ad009057\nLinux Linux 10df039834f84a297c72ec962c0f9b7c8c5ca31a\nLinux Linux 10df039834f84a297c72ec962c0f9b7c8c5ca31a\nLinux Linux 10df039834f84a297c72ec962c0f9b7c8c5ca31a\nLinux Linux f3f59bab68e9bc714f757ab22f3fb36153014043\nLinux Linux 6.1.156\nLinux Linux 6.6.112\nLinux Linux 6.12.53\nLinux Linux 6.17.3\nLinux Linux 6.18",
    "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": {
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        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "0b70ec82b309a4093106ff399da1911ad23b52d3",
    "vendor": "Linux",
    "ai_description": "",
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    "ai_score": 0
}