CVE-2025-38552 (GCVE-0-2025-38552)
Vulnerability from cvelistv5
Published
2025-08-16 11:34
Modified
2025-08-16 11:34
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: plug races between subflow fail and subflow creation We have races similar to the one addressed by the previous patch between subflow failing and additional subflow creation. They are just harder to trigger. The solution is similar. Use a separate flag to track the condition 'socket state prevent any additional subflow creation' protected by the fallback lock. The socket fallback makes such flag true, and also receiving or sending an MP_FAIL option. The field 'allow_infinite_fallback' is now always touched under the relevant lock, we can drop the ONCE annotation on write.
References
Impacted products
Vendor Product Version
Linux Linux Version: 478d770008b03ed9d74bdc8add2315b7fd124ecc
Version: 478d770008b03ed9d74bdc8add2315b7fd124ecc
Version: 478d770008b03ed9d74bdc8add2315b7fd124ecc
Version: 478d770008b03ed9d74bdc8add2315b7fd124ecc
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/pm.c",
            "net/mptcp/protocol.c",
            "net/mptcp/protocol.h",
            "net/mptcp/subflow.c"
          ],
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          "vendor": "Linux",
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          "programFiles": [
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            "net/mptcp/subflow.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.15"
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              "status": "unaffected",
              "version": "0",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: plug races between subflow fail and subflow creation\n\nWe have races similar to the one addressed by the previous patch between\nsubflow failing and additional subflow creation. They are just harder to\ntrigger.\n\nThe solution is similar. Use a separate flag to track the condition\n\u0027socket state prevent any additional subflow creation\u0027 protected by the\nfallback lock.\n\nThe socket fallback makes such flag true, and also receiving or sending\nan MP_FAIL option.\n\nThe field \u0027allow_infinite_fallback\u0027 is now always touched under the\nrelevant lock, we can drop the ONCE annotation on write."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-16T11:34:20.455Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/7c96d519ee15a130842a6513530b4d20acd2bfcd"
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          "url": "https://git.kernel.org/stable/c/659da22dee5ff316ba63bdaeeac7b58b5442f6c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/def5b7b2643ebba696fc60ddf675dca13f073486"
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      ],
      "title": "mptcp: plug races between subflow fail and subflow creation",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38552",
    "datePublished": "2025-08-16T11:34:20.455Z",
    "dateReserved": "2025-04-16T04:51:24.024Z",
    "dateUpdated": "2025-08-16T11:34:20.455Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38552\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-16T12:15:31.400\",\"lastModified\":\"2025-08-16T12:15:31.400\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmptcp: plug races between subflow fail and subflow creation\\n\\nWe have races similar to the one addressed by the previous patch between\\nsubflow failing and additional subflow creation. They are just harder to\\ntrigger.\\n\\nThe solution is similar. Use a separate flag to track the condition\\n\u0027socket state prevent any additional subflow creation\u0027 protected by the\\nfallback lock.\\n\\nThe socket fallback makes such flag true, and also receiving or sending\\nan MP_FAIL option.\\n\\nThe field \u0027allow_infinite_fallback\u0027 is now always touched under the\\nrelevant lock, we can drop the ONCE annotation on write.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/659da22dee5ff316ba63bdaeeac7b58b5442f6c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c96d519ee15a130842a6513530b4d20acd2bfcd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/def5b7b2643ebba696fc60ddf675dca13f073486\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f81b6fbe13c7fc413b5158cdffc6a59391a2a8db\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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