Improper locking in Linux kernel - CVE-2025-21910

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Main Vulnerability Database Vulnerabilities #VU106800

Improper locking in Linux kernel - CVE-2025-21910

Published: April 2, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU106800
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-21910
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available
Affected software:
Linux kernel
Debian Linux
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
Confidential Computing Module
Public Cloud Module
SUSE Real Time Module
Legacy Module
Development Tools Module
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
kgraft-patch-4_12_14-122_258-default
kernel-livepatch-6_4_0-150600_10_39-rt
kernel-livepatch-6_4_0-150600_10_39-rt-debuginfo
kernel-livepatch-SLE15-SP6-RT_Update_11-debugsource
kernel-livepatch-6_4_0-150700_53_3-default
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_1-debugsource
kernel-default
kernel-default-devel-debuginfo
kernel-default-devel
gfs2-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
ocfs2-kmp-default
kernel-default-base
dlm-kmp-default
gfs2-kmp-default
cluster-md-kmp-default
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
dlm-kmp-default-debuginfo
kernel-default-debugsource
kernel-macros
kernel-source
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-man
kernel-devel
linux (Ubuntu package)
linux-hwe-5.4 (Ubuntu package)
linux-iot (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-ibm (Ubuntu package)
linux-ibm-5.4 (Ubuntu package)
linux-bluefield (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-raspi (Ubuntu package)
linux-raspi-5.4 (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle-5.4 (Ubuntu package)
linux-aws (Ubuntu package)
linux-aws-5.4 (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gke (Ubuntu package)
linux-gcp (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux (Debian package)
kernel-source-coco
kernel-coco_debug
kernel-coco
kernel-coco_debug-debuginfo
kernel-syms-coco
kernel-coco-devel
kernel-coco_debug-devel
kernel-coco-debugsource
reiserfs-kmp-coco
kernel-coco_debug-debugsource
kernel-coco_debug-devel-debuginfo
kernel-coco-debuginfo
kernel-coco-vdso-debuginfo
reiserfs-kmp-coco-debuginfo
kernel-devel-coco
kernel-devel-azure
cluster-md-kmp-azure
ocfs2-kmp-azure
kernel-azure-optional-debuginfo
cluster-md-kmp-azure-debuginfo
kernel-azure-devel
kernel-azure
kernel-azure-extra-debuginfo
gfs2-kmp-azure-debuginfo
kselftests-kmp-azure-debuginfo
kernel-azure-devel-debuginfo
kselftests-kmp-azure
reiserfs-kmp-azure
kernel-syms-azure
gfs2-kmp-azure
ocfs2-kmp-azure-debuginfo
kernel-azure-debuginfo
dlm-kmp-azure-debuginfo
kernel-azure-vdso-debuginfo
kernel-azure-vdso
kernel-source-azure
kernel-azure-debugsource
dlm-kmp-azure
kernel-azure-extra
reiserfs-kmp-azure-debuginfo
kernel-azure-optional
cluster-md-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt-vdso-debuginfo
kernel-rt_debug-debugsource
kselftests-kmp-rt
kernel-rt_debug-devel
kernel-rt-vdso
kernel-rt-extra
kernel-rt-debugsource
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-optional-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
reiserfs-kmp-rt
gfs2-kmp-rt
kernel-rt_debug-vdso-debuginfo
kernel-rt-livepatch-devel
kselftests-kmp-rt-debuginfo
kernel-rt-optional
kernel-rt_debug
kernel-rt
kernel-source-rt
kernel-devel-rt
kernel-rt-devel
kernel-rt-extra-debuginfo
kernel-syms-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-vdso
kernel-rt_debug-devel-debuginfo
kernel-rt-debuginfo
ocfs2-kmp-rt
kernel-zfcpdump
reiserfs-kmp-default
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel-zfcpdump-debugsource
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-default-livepatch
kernel-zfcpdump-debuginfo
kernel-64kb
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
reiserfs-kmp-default-debuginfo
kernel
kernel-tools
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-oem-6.11 (Ubuntu package)

Detailed vulnerability description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the is_an_alpha2() function in net/wireless/reg.c. A local user can perform a denial of service (DoS) attack.


How to mitigate CVE-2025-21910

Install update from vendor's website.

Sources