CVE-2025-21900 (GCVE-0-2025-21900)

Vulnerability from cvelistv5 – Published: 2025-04-01 15:26 – Updated: 2025-10-01 17:18
VLAI?
Title
NFSv4: Fix a deadlock when recovering state on a sillyrenamed file
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.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: adb4b42d19aea91826621a8d0bac94cf2c08f8bc , < 4fe4ae6c2e01d028856b73b6328b12b8945df871 (git)
Affected: adb4b42d19aea91826621a8d0bac94cf2c08f8bc , < f41a60bc43e7abbc636fee78bed0d74c31e738b0 (git)
Affected: adb4b42d19aea91826621a8d0bac94cf2c08f8bc , < 8f8df955f078e1a023ee55161935000a67651f38 (git)
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    Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.18 , ≤ 6.12.* (semver)
Unaffected: 6.13.6 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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Sightings

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  • 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.



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