CVE-2025-21795

Advisory lineage Upstream: 0 Downstream: 37
Modified
Published: 27 Feb 2025, 02:18
Last modified:23 May 2026, 15:57

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability -0.04%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Feb 2025, 02:18
Published
Vulnerability first disclosed
23 May 2026, 15:57
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix hang in nfsd4_shutdown_callback If nfs4_client is in courtesy state then there is no point to send the callback. This causes nfsd4_shutdown_callback to hang since cl_cb_inflight is not 0. This hang lasts about 15 minutes until TCP notifies NFSD that the connection was dropped. This patch modifies nfsd4_run_cb_work to skip the RPC call if nfs4_client is in courtesy state.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Affected Systems

  • linux•linux

    ≥ 67ef9e5fd737eab2495f2586df7e9ea30caa1b77, < abed68027ea3ab893ac85cc46a00e2e64a324239 | ≥ 26540b8940a2e21582afa61a6fb8af87310bac72, < efa8a261c575f816c7e79a87aeb3ef8a0bd6b221 | ≥ 66af25799940b26efd41ea6e648f75c41a48a2c2, < 38d345f612503b850c2973e5a879f88e441b34d7 | ≥ 66af25799940b26efd41ea6e648f75c41a48a2c2, < 23ad7797c74cd8f7f90617f1e59a8703e2b43908 | ≥ 66af25799940b26efd41ea6e648f75c41a48a2c2, < cedfbb92cf97a6bff3d25633001d9c44442ee854 | ≥ 66af25799940b26efd41ea6e648f75c41a48a2c2, < e88d2451cd42e025465d6b51fd716a47b0b3800d | ≥ 66af25799940b26efd41ea6e648f75c41a48a2c2, < 036ac2778f7b28885814c6fbc07e156ad1624d03 | ≥ 5.10.220, < 5.10.235 | ≥ 5.15.154, < 5.15.179 | 5.19

  • linux•linux_kernel

    ≥ 5.10.220, < 5.10.235 | ≥ 5.15.154, < 5.15.179 | ≥ 5.19, < 6.1.129 | ≥ 6.2, < 6.6.79 | ≥ 6.7, < 6.12.16 | ≥ 6.13, < 6.13.4 | 6.14:rc1 | 6.14:rc2

References (11)