netfilter: nfnetlink_queue: make hash table per queue_CVE-2026-43084

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: make hash table per queue\n\nSharing a global hash table among all queues is tempting, but\nit can cause crash:\n\nBUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue]\n[..]\n nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue]\n nfnetlink_rcv_msg+0x46a/0x930\n kmem_cache_alloc_node_noprof+0x11e/0x450\n\nstruct nf_queue_entry is freed via kfree, but parallel cpu can still\nencounter such an nf_queue_entry when walking the list.\n\nAlternative fix is to free the nf_queue_entry via kfree_rcu() instead,\nbut as we have to alloc/free for each skb this will cause more mem\npressure.",
    "published": "2026-05-06T07:40:19.253Z",
    "modified": "2026-05-08T12:40:27.947Z",
    "type": "cve",
    "title": "netfilter: nfnetlink_queue: make hash table per queue",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252\nhttps://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a\nhttps://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f\nhttps://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d",
    "id": "CVE-2026-43084",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 371de2bef6582a3f58049b3d18e190924af9c9a0\nLinux Linux 870e3e63da8e88daffe9d692a025c711658018a8\nLinux Linux 70e2e3ce4f6841e12ec1c104fc76c0e707398ec4\nLinux Linux e19079adcd26a25d7d3e586b1837493361fdf8b6\nLinux Linux 6.12.75\nLinux Linux 6.18.14\nLinux Linux 6.19.4",
    "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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "371de2bef6582a3f58049b3d18e190924af9c9a0",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}