FKIE_CVE-2025-68242

Vulnerability from fkie_nvd - Published: 2025-12-16 15:15 - Updated: 2026-10-14 13:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix LTP test failures when timestamps are delegated The utimes01 and utime06 tests fail when delegated timestamps are enabled, specifically in subtests that modify the atime and mtime fields using the 'nobody' user ID. The problem can be reproduced as follow: # echo "/media *(rw,no_root_squash,sync)" >> /etc/exports # export -ra # mount -o rw,nfsvers=4.2 127.0.0.1:/media /tmpdir # cd /opt/ltp # ./runltp -d /tmpdir -s utimes01 # ./runltp -d /tmpdir -s utime06 This issue occurs because nfs_setattr does not verify the inode's UID against the caller's fsuid when delegated timestamps are permitted for the inode. This patch adds the UID check and if it does not match then the request is sent to the server for permission checking.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e9be902041c6b9f0ed4b72764187eed1067a42f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b2e4cda71ed062c87573b016d2d956a62f4258ed
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b623390045a81fc559decb9bfeb79319721d3dfb
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b2e4cda71ed062c87573b016d2d956a62f4258ed",
              "status": "affected",
              "version": "e12912d94137ab36ee704a91f465ff15c8b423da",
              "versionType": "git"
            },
            {
              "lessThan": "0e9be902041c6b9f0ed4b72764187eed1067a42f",
              "status": "affected",
              "version": "e12912d94137ab36ee704a91f465ff15c8b423da",
              "versionType": "git"
            },
            {
              "lessThan": "b623390045a81fc559decb9bfeb79319721d3dfb",
              "status": "affected",
              "version": "e12912d94137ab36ee704a91f465ff15c8b423da",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.59",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: Fix LTP test failures when timestamps are delegated\n\nThe utimes01 and utime06 tests fail when delegated timestamps are\nenabled, specifically in subtests that modify the atime and mtime\nfields using the \u0027nobody\u0027 user ID.\n\nThe problem can be reproduced as follow:\n\n# echo \"/media *(rw,no_root_squash,sync)\" \u003e\u003e /etc/exports\n# export -ra\n# mount -o rw,nfsvers=4.2 127.0.0.1:/media /tmpdir\n# cd /opt/ltp\n# ./runltp -d /tmpdir -s utimes01\n# ./runltp -d /tmpdir -s utime06\n\nThis issue occurs because nfs_setattr does not verify the inode\u0027s\nUID against the caller\u0027s fsuid when delegated timestamps are\npermitted for the inode.\n\nThis patch adds the UID check and if it does not match then the\nrequest is sent to the server for permission checking."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nNFS: Corrige fallos en las pruebas LTP cuando las marcas de tiempo son delegadas\n\nLas pruebas utimes01 y utime06 fallan cuando las marcas de tiempo delegadas est\u00e1n habilitadas, espec\u00edficamente en subpruebas que modifican los campos atime y mtime usando el ID de usuario \u0027nobody\u0027.\n\nEl problema puede reproducirse como sigue:\n\n# echo \u201c/media *(rw,no_root_squash,sync)\u201d \u003e\u003e /etc/exports\n# export -ra\n# mount -o rw,nfsvers=4.2 127.0.0.1:/media /tmpdir\n# cd /opt/ltp\n# ./runltp -d /tmpdir -s utimes01\n# ./runltp -d /tmpdir -s utime06\n\nEste problema ocurre porque nfs_setattr no verifica el UID del inodo contra el fsuid del llamador cuando las marcas de tiempo delegadas est\u00e1n permitidas para el inodo.\n\nEste parche a\u00f1ade la verificaci\u00f3n del UID y si no coincide, entonces la solicitud es enviada al servidor para la verificaci\u00f3n de permisos."
    }
  ],
  "id": "CVE-2025-68242",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {},
  "published": "2025-12-16T15:15:53.430",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e9be902041c6b9f0ed4b72764187eed1067a42f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b2e4cda71ed062c87573b016d2d956a62f4258ed"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b623390045a81fc559decb9bfeb79319721d3dfb"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.