VULNERABILITY INTELLIGENCE
CVE-2025-21900
CVSS score7.5 HIGH
EPSS probability0.36%
CISA KEVNot currently listed
Published2025-04-01
Last modified2026-07-30
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
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.
Weakness classification
- nvd@nist.gov: CWE-667
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-667