netfilter: nfnetlink_queue: make hash table per queue

{
  "id": "6a3db258e75626dab0d9cb90ae9211d856b71d6103e93e16dfeef84e14faf630",
  "url": "https://osv.dev/vulnerability/CVE-2026-43084",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfilter: nfnetlink_queue: make hash table per queue",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.",
    "evidence": "osv:CVE-2026-43084",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.83",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.24",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.14",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-43084",
      "aliases": [
        "CVE-2026-43084"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
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                  "fixed": "22730cb96093b5be0609063bbb1923dbecd61252"
                }
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            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "870e3e63da8e88daffe9d692a025c711658018a8"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "70e2e3ce4f6841e12ec1c104fc76c0e707398ec4"
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                  "fixed": "9e5ebef91120d2764aefe557c3a484b6288f341f"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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            "v6.12.81",
            "v6.12.80",
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            "v6.12.78",
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            "v6.18.14",
            "v6.19.13",
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            "v6.19.11",
            "v6.19.10",
            "v6.19.9",
            "v6.19.8",
            "v6.19.7",
            "v6.19.6",
            "v6.19.5",
            "v6.19.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43084.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.12.75"
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                  "fixed": "6.12.83"
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              "type": "ECOSYSTEM",
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                  "introduced": "6.18.14"
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                {
                  "fixed": "6.18.24"
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              ]
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              "events": [
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                  "introduced": "6.19.4"
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                {
                  "fixed": "6.19.14"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43084.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.491973410Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252",
        "https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a",
        "https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d",
        "https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43084",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43084",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498657,
  "published_at": "2026-05-06T07:40:19.253+00:00"
}