{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "371de2bef6582a3f58049b3d18e190924af9c9a0"
            },
            {
              "fixed": "22730cb96093b5be0609063bbb1923dbecd61252"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "870e3e63da8e88daffe9d692a025c711658018a8"
            },
            {
              "fixed": "41e3652a178cb0eecd48e0e6e27fbb73a004046a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "70e2e3ce4f6841e12ec1c104fc76c0e707398ec4"
            },
            {
              "fixed": "9e5ebef91120d2764aefe557c3a484b6288f341f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "e19079adcd26a25d7d3e586b1837493361fdf8b6"
            },
            {
              "fixed": "936206e3f6ff411581e615e930263d6f8b78df9d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.75"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.18.14"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.4"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json"
  },
  "details": "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.",
  "id": "CVE-2026-43084",
  "modified": "2026-08-12T03:51:10.308857638Z",
  "published": "2026-05-06T07:40:19.253Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/22730cb96093b5be0609063bbb1923dbecd61252"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41e3652a178cb0eecd48e0e6e27fbb73a004046a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/936206e3f6ff411581e615e930263d6f8b78df9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e5ebef91120d2764aefe557c3a484b6288f341f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43084.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43084"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "netfilter: nfnetlink_queue: make hash table per queue"
}