smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().

{
  "id": "7b8d8fb4cbab7f98adc500d8df394dece929cb554be042981afdbd6173acda2c",
  "url": "https://osv.dev/vulnerability/CVE-2025-40139",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set(). smc_clc_prfx_set() is called during connect() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dev_dst_rcu() under rcu_read_lock() after kernel_getsockname(). Note that the returned value of smc_clc_prfx_set() is not used in the caller. While at it, we change the 1st arg of smc_clc_prfx_set[46]_rcu() not to touch dst there.",
    "evidence": "osv:CVE-2025-40139",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.187",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.156",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.108",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.17.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-40139",
      "aliases": [
        "CVE-2025-40139"
      ],
      "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": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "fixed": "5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde"
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                  "fixed": "80d1fd39f4e37d836655e9f7ffccaf78925049bf"
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                {
                  "fixed": "956c57daba55cf9ed25d9f2512883b8a1a927599"
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                  "fixed": "0736993bfe5c7a9c744ae3fac62d769dfdae54e1"
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        {
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "4.11.0"
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            {
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40139.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.804257638Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0736993bfe5c7a9c744ae3fac62d769dfdae54e1",
        "https://git.kernel.org/stable/c/5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fde",
        "https://git.kernel.org/stable/c/80d1fd39f4e37d836655e9f7ffccaf78925049bf",
        "https://git.kernel.org/stable/c/935d783e5de9b64587f3adb25641dd8385e64ddb",
        "https://git.kernel.org/stable/c/956c57daba55cf9ed25d9f2512883b8a1a927599",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40139.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-40139",
        "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-2025-40139.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-40139",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519612,
  "published_at": "2025-11-12T10:23:24.216+00:00"
}