cbcvebase.
CVE-2025-21795
published 2025-02-27

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…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.62%
46.3th percentile
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

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.129-1 (bookworm)linux 6.1.129-1 (bookworm)
debianlinux-6.1< linux 6.1.129-1 (bookworm)linux 6.1.129-1 (bookworm)
linuxlinux
linuxlinux>= 26540b8940a2e21582afa61a6fb8af87310bac72 < efa8a261c575f816c7e79a87aeb3ef8a0bd6b221efa8a261c575f816c7e79a87aeb3ef8a0bd6b221
linuxlinux>= 5.10.220 < 5.10.2355.10.235
linuxlinux>= 5.15.154 < 5.15.1795.15.179
linuxlinux>= 66af25799940b26efd41ea6e648f75c41a48a2c2 < 38d345f612503b850c2973e5a879f88e441b34d738d345f612503b850c2973e5a879f88e441b34d7
linuxlinux>= 66af25799940b26efd41ea6e648f75c41a48a2c2 < 23ad7797c74cd8f7f90617f1e59a8703e2b4390823ad7797c74cd8f7f90617f1e59a8703e2b43908
linuxlinux>= 66af25799940b26efd41ea6e648f75c41a48a2c2 < cedfbb92cf97a6bff3d25633001d9c44442ee854cedfbb92cf97a6bff3d25633001d9c44442ee854
linuxlinux>= 66af25799940b26efd41ea6e648f75c41a48a2c2 < e88d2451cd42e025465d6b51fd716a47b0b3800de88d2451cd42e025465d6b51fd716a47b0b3800d
linuxlinux>= 66af25799940b26efd41ea6e648f75c41a48a2c2 < 036ac2778f7b28885814c6fbc07e156ad1624d03036ac2778f7b28885814c6fbc07e156ad1624d03
linuxlinux>= 67ef9e5fd737eab2495f2586df7e9ea30caa1b77 < abed68027ea3ab893ac85cc46a00e2e64a324239abed68027ea3ab893ac85cc46a00e2e64a324239
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.237-15.10.237-1
linuxlinux_kernel>= 0 < 6.1.129-16.1.129-1
linuxlinux_kernel>= 0 < 6.12.16-16.12.16-1
linuxlinux_kernel>= 0 < 6.12.16-16.12.16-1
linuxlinux_kernel>= 0 < 5.15.0-140.1505.15.0-140.150
linuxlinux_kernel>= 0 < 6.8.0-78.786.8.0-78.78
linuxlinux_kernel>= 5.10.220 < 5.10.2355.10.235
linuxlinux_kernel>= 5.15.154 < 5.15.1795.15.179
linuxlinux_kernel>= 5.19 < 6.1.1296.1.129
linuxlinux_kernel>= 6.13 < 6.13.46.13.4
linuxlinux_kernel>= 6.2 < 6.6.796.6.79

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.