mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().

{
  "id": "885c7d906cf10e8494d0dc49e84d0fd33a60ab9502eb1ccc951e981ed435b623",
  "url": "https://osv.dev/vulnerability/CVE-2025-40133",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable(). mptcp_active_enable() is called from subflow_finish_connect(), which is icsk->icsk_af_ops->sk_rx_dst_set() and it's not always under RCU. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu().",
    "evidence": "osv:CVE-2025-40133",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.17.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-40133",
      "aliases": [
        "CVE-2025-40133"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "27069e7cb3d1cea9377069266acf19b9cc5ad0ae"
                },
                {
                  "fixed": "ad16235c9d3ef7ec17c109ff39b7504f49d17072"
                },
                {
                  "fixed": "cc976ec9e38bb79409de3261ba1dbb6868e2a53e"
                },
                {
                  "fixed": "893c49a78d9f85e4b8081b908fb7c407d018106a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40133.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "fixed": "6.12.55"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.17.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40133.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.332511997Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/893c49a78d9f85e4b8081b908fb7c407d018106a",
        "https://git.kernel.org/stable/c/ad16235c9d3ef7ec17c109ff39b7504f49d17072",
        "https://git.kernel.org/stable/c/cc976ec9e38bb79409de3261ba1dbb6868e2a53e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40133.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-40133",
        "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/2025/40xxx/CVE-2025-40133.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-40133",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509157,
  "published_at": "2025-11-12T10:23:22.498+00:00"
}