CVE-2025-21900
MEDIUM EPSS 3.1%
Published Apr 1, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Published Apr 1, 2025 1y ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
3.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-667
Affected Products 6
References 3
- git.kernel.org https://git.kernel.org/stable/c/4fe4ae6c2e01d028856b73b6328b12b8945df871
- git.kernel.org https://git.kernel.org/stable/c/8f8df955f078e1a023ee55161935000a67651f38
- git.kernel.org https://git.kernel.org/stable/c/f41a60bc43e7abbc636fee78bed0d74c31e738b0
Remediation
- git.kernel.org https://git.kernel.org/stable/c/4fe4ae6c2e01d028856b73b6328b12b8945df871
- git.kernel.org https://git.kernel.org/stable/c/8f8df955f078e1a023ee55161935000a67651f38
- git.kernel.org https://git.kernel.org/stable/c/f41a60bc43e7abbc636fee78bed0d74c31e738b0