Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.11, < 6.12.18 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/4fe4ae6c2e01d028856b73b6328b12b8945df871Patch
- https://git.kernel.org/stable/c/8f8df955f078e1a023ee55161935000a67651f38Patch
- https://git.kernel.org/stable/c/f41a60bc43e7abbc636fee78bed0d74c31e738b0Patch
FAQ
What is CVE-2025-21900?
CVE-2025-21900 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2025-21900?
CVE-2025-21900 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21900?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.