NetSight
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high7.5

CVE-2025-21795

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…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 5.10.220 before 5.10.235
from 5.15.154 before 5.15.179
from 5.19 before 6.1.129
from 6.2 before 6.6.79
from 6.7 before 6.12.16
from 6.13 before 6.13.4

References