CVE-2025-21900
NFSv4: Fix a deadlock when recovering state on a sillyrenamed file
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Apr 1, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
adb4b42d19aea91826621a8d0bac94cf2c08f8bc < 4fe4ae6c2e01d028856b73b6328b12b8945df871 adb4b42d19aea91826621a8d0bac94cf2c08f8bc < f41a60bc43e7abbc636fee78bed0d74c31e738b0 adb4b42d19aea91826621a8d0bac94cf2c08f8bc < 8f8df955f078e1a023ee55161935000a67651f38
Linux / Linux
6.11