CVE-2025-40168 (GCVE-0-2025-40168)
Vulnerability from cvelistv5
Published
2025-11-12 10:46
Modified
2025-11-12 10:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller.
References
Impacted products
Vendor Product Version
Linux Linux Version: a046d57da19f812216f393e7c535f5858f793ac3
Version: a046d57da19f812216f393e7c535f5858f793ac3
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().\n\nsmc_clc_prfx_match() is called from smc_listen_work() and\nnot under RCU nor RTNL.\n\nUsing sk_dst_get(sk)-\u003edev could trigger UAF.\n\nLet\u0027s use __sk_dst_get() and dst_dev_rcu().\n\nNote that the returned value of smc_clc_prfx_match() is not\nused in the caller."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-12T10:46:51.422Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/235f81045c008169cc4e1955b4a64e118eebe61b"
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      ],
      "title": "smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40168",
    "datePublished": "2025-11-12T10:46:51.422Z",
    "dateReserved": "2025-04-16T07:20:57.176Z",
    "dateUpdated": "2025-11-12T10:46:51.422Z",
    "state": "PUBLISHED"
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  }
}


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