{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8d45ff22f1b43249f0cf1baafe0262ca10d1666e"
            },
            {
              "fixed": "a907bea273b60d3e604ec4e8e1f6c49954805794"
            },
            {
              "fixed": "0b18d1b834ab5a5009be70b530f978d7989e445b"
            },
            {
              "fixed": "b38d2b4603fd3dda24eb8b3dd81c18a0930be97b"
            },
            {
              "fixed": "47b1c5d1b0944aa88299f55a846fabaefc756982"
            },
            {
              "fixed": "cf4a4df38d1747e06fc54f9879bd7a6f4178032f"
            },
            {
              "fixed": "9853d94b82d303fc4ac37d592a23a154096ecd41"
            },
            {
              "fixed": "208669df703a25a601f45822b10c413f258bf275"
            },
            {
              "fixed": "f1ba83755d81c6fc66ac7acd723d238f974091e9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.7.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43451.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: fix entry leak in bridge verdict error path\n\nnfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue\nentry from the queue data structures, taking ownership of the entry.\nFor PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN\nattributes.  If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN\npresent but NFQA_VLAN_TCI missing), the function returns immediately\nwithout freeing the dequeued entry or its sk_buff.\n\nThis leaks the nf_queue_entry, its associated sk_buff, and all held\nreferences (net_device refcounts, struct net refcount).  Repeated\ntriggering exhausts kernel memory.\n\nFix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict\non the error path, consistent with other error handling in this file.",
  "id": "CVE-2026-43451",
  "modified": "2026-07-08T05:39:02.197161423Z",
  "published": "2026-05-08T14:22:16.716Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43451.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43451"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path"
}