netfilter: nfnetlink_queue: hold nfnl mutex in event notifier

{
  "id": "72d0f26c3f3e18c6b4cc5f8da0ebd904953cc3fd410a138d617e633d9a649162",
  "url": "https://osv.dev/vulnerability/CVE-2026-98624",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfilter: nfnetlink_queue: hold nfnl mutex in event notifier",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: hold nfnl mutex in event notifier We must serialize the release notifier and the config netlink function. A concurrent thread can issue close() which can call the release function while unrelated socket processes UNBIND request for same portid: Oops: general protection fault, [..] RIP: 0010:__instance_destroy+0x60/0x210 [nfnetlink_queue] Call Trace: nfqnl_recv_config+0x9b0/0xdc0 [nfnetlink_queue] nfnetlink_rcv_msg+0x7c2/0xeb0 ? __pfx_nfnetlink_rcv_msg+0x10/0x10 After this, parallel UNBIND and URELEASE events are impossible. This change isn't nice, but its the shortest fix given instances are not refcounted and the nfnetlink config callback drops the rcu read lock early due to need for sleeping allocations.",
    "evidence": "osv:CVE-2026-98624",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.271",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.222",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.189",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.158",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.112",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98624",
      "aliases": [
        "CVE-2026-98624"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb"
                },
                {
                  "fixed": "46432f2e76f7c385d82506304a2928e7d293289f"
                },
                {
                  "fixed": "597320337c3da06c92a9e95cfc755da66fedc476"
                },
                {
                  "fixed": "2e9be1302f25c9be51c2fb8c907bc6d8a1050e33"
                },
                {
                  "fixed": "d559e06a5ab7c064100aafd5c826eadd0f1c6216"
                },
                {
                  "fixed": "1d1184411599a7c2217560bab3bbe641c6d03b95"
                },
                {
                  "fixed": "07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1"
                },
                {
                  "fixed": "8137a39e08e838ced234044384740ceeb99ed388"
                },
                {
                  "fixed": "9461613afc59acef44a0071b0dd5075f6e993ffe"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98624.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.14"
                },
                {
                  "fixed": "5.10.271"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.222"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.189"
                }
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            {
              "type": "ECOSYSTEM",
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                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.158"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.112"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.55"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.9"
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              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98624.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.019792898Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1",
        "https://git.kernel.org/stable/c/1d1184411599a7c2217560bab3bbe641c6d03b95",
        "https://git.kernel.org/stable/c/2e9be1302f25c9be51c2fb8c907bc6d8a1050e33",
        "https://git.kernel.org/stable/c/46432f2e76f7c385d82506304a2928e7d293289f",
        "https://git.kernel.org/stable/c/597320337c3da06c92a9e95cfc755da66fedc476",
        "https://git.kernel.org/stable/c/8137a39e08e838ced234044384740ceeb99ed388",
        "https://git.kernel.org/stable/c/9461613afc59acef44a0071b0dd5075f6e993ffe",
        "https://git.kernel.org/stable/c/d559e06a5ab7c064100aafd5c826eadd0f1c6216",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98624.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98624",
        "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/2026/98xxx/CVE-2026-98624.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98624",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521910,
  "published_at": "2026-10-18T15:19:45.566+00:00"
}