fkie_cve-2025-38247
Vulnerability from fkie_nvd
Published
2025-07-09 11:15
Modified
2025-11-19 21:01
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0748e553df0225754c316a92af3a77fdc057b358Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/142db4e76110dd80239f4e79810f85ea1735ad60Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.16
linux linux_kernel 6.16
linux linux_kernel 6.16


To clipboard 

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  "configurations": [
    {
      "nodes": [
        {
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F4823E88-411C-4CCD-AA8D-3917D070E873",
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  "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."
    }
  ],
  "id": "CVE-2025-38247",
  "lastModified": "2025-11-19T21:01:49.597",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2025-07-09T11:15:26.847",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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    }
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}


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