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CVE-2025-21795

NFSD: fix hang in nfsd4_shutdown_callback

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.235, 5.15.179, 6.1.129, 6.6.79, 6.12.16, and 1 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 67ef9e5fd737eab2495f2586df7e9ea30caa1b77 · fixed in abed68027ea3ab893ac85cc46a00e2e64a324239; From 26540b8940a2e21582afa61a6fb8af87310bac72 · fixed in efa8a261c575f816c7e79a87aeb3ef8a0bd6b221; From 66af25799940b26efd41ea6e648f75c41a48a2c2 · fixed in 38d345f612503b850c2973e5a879f88e441b34d7; From 66af25799940b26efd41ea6e648f75c41a48a2c2 · fixed in 23ad7797c74cd8f7f90617f1e59a8703e2b43908; From 66af25799940b26efd41ea6e648f75c41a48a2c2 · fixed in cedfbb92cf97a6bff3d25633001d9c44442ee854; From 66af25799940b26efd41ea6e648f75c41a48a2c2 · fixed in e88d2451cd42e025465d6b51fd716a47b0b3800d; From 66af25799940b26efd41ea6e648f75c41a48a2c2 · fixed in 036ac2778f7b28885814c6fbc07e156ad1624d03; From 5.10.220 · fixed in 5.10.235; From 5.15.154 · fixed in 5.15.179

  • Linux Linux

    5.19

  • KernelLinux

    fixed in 5.10.235; From 5.11.0 · fixed in 5.15.179; From 5.16.0 · fixed in 6.1.129; From 5.19.0 · fixed in 6.6.79; From 6.2.0 · fixed in 6.12.16; From 6.7.0 · fixed in 6.13.4

References 7

git.kernel.org