PT-2025-14281 · Linux+5 · Linux Kernel+5
Published
2025-02-01
·
Updated
2026-01-20
·
CVE-2025-21900
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A deadlock issue in the Linux kernel's NFSv4 component has been identified. This occurs when a file is
sillyrenamed and slated for deletion upon close. If the server reboots, it may trigger an open reclaim, which can then race with the application's call to close(). This can lead to a deadlock because the subsequent call to put nfs open context() triggers a synchronous delegreturn call that is not marked as privileged. The issue is resolved by ensuring that nfs4 inode return delegation on close() catches the delegreturn and schedules it asynchronously.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Locking
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Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Red Os
Ubuntu