CVE-2025-38247 (GCVE-0-2025-38247)
Vulnerability from cvelistv5
Published
2025-07-09 10:42
Modified
2025-07-28 04:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: userns and mnt_idmap leak in open_tree_attr(2) Once want_mount_setattr() has returned a positive, it does require finish_mount_kattr() to release ->mnt_userns. Failing do_mount_setattr() does not change that. As the result, we can end up leaking userns and possibly mnt_idmap as well.
References
Impacted products
Vendor Product Version
Linux Linux Version: c4a16820d90199409c9bf01c4f794e1e9e8d8fd8
Version: c4a16820d90199409c9bf01c4f794e1e9e8d8fd8
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.5",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuserns and mnt_idmap leak in open_tree_attr(2)\n\nOnce want_mount_setattr() has returned a positive, it does require\nfinish_mount_kattr() to release -\u003emnt_userns.  Failing do_mount_setattr()\ndoes not change that.\n\nAs the result, we can end up leaking userns and possibly mnt_idmap as\nwell."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:16:07.834Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/142db4e76110dd80239f4e79810f85ea1735ad60"
        },
        {
          "url": "https://git.kernel.org/stable/c/0748e553df0225754c316a92af3a77fdc057b358"
        }
      ],
      "title": "userns and mnt_idmap leak in open_tree_attr(2)",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38247",
    "datePublished": "2025-07-09T10:42:28.531Z",
    "dateReserved": "2025-04-16T04:51:23.997Z",
    "dateUpdated": "2025-07-28T04:16:07.834Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38247\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-07-09T11:15:26.847\",\"lastModified\":\"2025-07-10T13:17:30.017\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nuserns and mnt_idmap leak in open_tree_attr(2)\\n\\nOnce want_mount_setattr() has returned a positive, it does require\\nfinish_mount_kattr() to release -\u003emnt_userns.  Failing do_mount_setattr()\\ndoes not change that.\\n\\nAs the result, we can end up leaking userns and possibly mnt_idmap as\\nwell.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fuga de userns y mnt_idmap en open_tree_attr(2). Una vez que want_mount_setattr() ha devuelto un resultado positivo, requiere finish_mount_kattr() para liberar -\u0026gt;mnt_userns. Un fallo en do_mount_setattr() no cambia esto. Como resultado, podemos acabar con fugas de userns y posiblemente tambi\u00e9n de mnt_idmap.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0748e553df0225754c316a92af3a77fdc057b358\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/142db4e76110dd80239f4e79810f85ea1735ad60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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