fkie_cve-2025-21900
Vulnerability from fkie_nvd
Published
2025-04-01 16:15
Modified
2025-10-01 18:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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: NFSv4: Fix a deadlock when recovering state on a sillyrenamed file If the file is sillyrenamed, and slated for delete on close, it is possible for a server reboot to triggeer an open reclaim, with can again race with the application call to close(). When that happens, the call to put_nfs_open_context() can trigger a synchronous delegreturn call which deadlocks because it is not marked as privileged. Instead, ensure that the call to nfs4_inode_return_delegation_on_close() catches the delegreturn, and schedules it asynchronously.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4fe4ae6c2e01d028856b73b6328b12b8945df871Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f8df955f078e1a023ee55161935000a67651f38Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f41a60bc43e7abbc636fee78bed0d74c31e738b0Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14
linux linux_kernel 6.14


To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Fix a deadlock when recovering state on a sillyrenamed file\n\nIf the file is sillyrenamed, and slated for delete on close, it is\npossible for a server reboot to triggeer an open reclaim, with can again\nrace with the application call to close(). When that happens, the call\nto put_nfs_open_context() can trigger a synchronous delegreturn call\nwhich deadlocks because it is not marked as privileged.\n\nInstead, ensure that the call to nfs4_inode_return_delegation_on_close()\ncatches the delegreturn, and schedules it asynchronously."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4: Se corrige un bloqueo al recuperar el estado de un archivo con un nombre sillyrenombrado. Si el archivo tiene un nombre sillyrenombrado y se programa para eliminarse al cerrarse, es posible que un reinicio del servidor active una recuperaci\u00f3n abierta, que puede competir con la llamada de la aplicaci\u00f3n a close(). En este caso, la llamada a put_nfs_open_context() puede activar una llamada delegreturn s\u00edncrona que se bloquea al no estar marcada como privilegiada. En su lugar, aseg\u00farese de que la llamada a nfs4_inode_return_delegation_on_close() capture la devoluci\u00f3n delegreturn y la programe de forma as\u00edncrona."
    }
  ],
  "id": "CVE-2025-21900",
  "lastModified": "2025-10-01T18:15:38.160",
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          "confidentialityImpact": "NONE",
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}


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