Improper locking in Linux kernel - CVE-2025-21943

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Main Vulnerability Database Vulnerabilities #VU106768

Improper locking in Linux kernel - CVE-2025-21943

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


Vulnerability identifier: #VU106768
CSH Severity: Low
CVSS v4 BT: 4.3 [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-2025-21943
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to improper locking within the new_device_store(), kfree() and delete_device_store() functions in drivers/gpio/gpio-aggregator.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Confidential Computing Module
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
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-SLE15-SP7_Update_1-debugsource
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo
kernel-livepatch-6_4_0-150700_53_3-default
perf-debuginfo
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
kernel
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
python3-perf
python3-perf-debuginfo
bpftool
bpftool-debuginfo
linux (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gke (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-gcp (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux (Debian package)
kernel-source-coco
kernel-devel-coco
reiserfs-kmp-coco-debuginfo
kernel-coco-debuginfo
kernel-coco-vdso-debuginfo
kernel-coco-devel
kernel-coco_debug-devel-debuginfo
kernel-coco_debug
kernel-coco
kernel-coco_debug-debuginfo
kernel-syms-coco
kernel-coco_debug-debugsource
reiserfs-kmp-coco
kernel-coco-debugsource
kernel-coco_debug-devel
kernel-devel-azure
kernel-source-azure
cluster-md-kmp-azure
ocfs2-kmp-azure
kernel-azure-optional-debuginfo
cluster-md-kmp-azure-debuginfo
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-optional
reiserfs-kmp-azure-debuginfo
kernel-azure-extra
dlm-kmp-azure
kernel-azure-extra-debuginfo
gfs2-kmp-azure-debuginfo
kernel-azure-devel-debuginfo
kselftests-kmp-azure-debuginfo
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure
dlm-kmp-azure-debuginfo
kernel-azure-debuginfo
ocfs2-kmp-azure-debuginfo
gfs2-kmp-azure
kernel-syms-azure
reiserfs-kmp-azure
kselftests-kmp-azure
kernel-rt-vdso
cluster-md-kmp-rt-debuginfo
kernel-rt-extra
kernel-rt-debugsource
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-vdso-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
ocfs2-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt_debug-vdso
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-devel
kernel-rt_debug-devel-debuginfo
kernel-rt-debuginfo
ocfs2-kmp-rt
kernel-rt-optional
dlm-kmp-rt
kernel-rt_debug-debugsource
kselftests-kmp-rt
kernel-default-extra
kernel-default-livepatch
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-debuginfo
kernel-default-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-default
kernel-default-extra-debuginfo
kernel-obs-build
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb-devel
kernel-64kb
kernel-default-livepatch-devel
kernel-64kb-devel-debuginfo
kernel-default-devel-debuginfo
kernel-default-devel
kernel-macros
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-docs
kernel-obs-build-debugsource
kernel-syms
kernel-default-base
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-oracle (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-oem-6.11 (Ubuntu package)

How to mitigate CVE-2025-21943

Install update from vendor's website.

Linux kernel - update to 5.10.235
kernel-livepatch-6_4_0-150600_10_39-rt - update to 1-150600.1.3.2
kernel-livepatch-6_4_0-150600_10_39-rt-debuginfo - update to 1-150600.1.3.2
kernel-livepatch-SLE15-SP6-RT_Update_11-debugsource - update to 1-150600.1.3.2
kernel-livepatch-SLE15-SP7_Update_1-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_3-default - update to 1-150700.15.3.1
perf-debuginfo - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-source - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-headers - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-devel - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debugsource - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debuginfo - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-debuginfo - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-devel - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf-debuginfo - addressed in versions 5.10.0-259.0.0.161, 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
bpftool - addressed in versions 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
bpftool-debuginfo - addressed in versions 5.10.0-259.0.0.162, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
linux (Ubuntu package) - addressed in versions 5.15.0.140.126, 5.15.0.140.135, 5.15.0-140.150, 5.15.0-140.150~20.04.1, 5.15.0.140.150~20.04.1, 5.15.0.1066.65, 5.15.0-1066.74, 5.15.0.1076.72, 5.15.0-1076.79, 5.15.0.1076.79~20.04.1, 5.15.0-1076.79~20.04.1, 5.15.0.1078.78, 5.15.0-1078.79, 5.15.0.1079.79, 5.15.0-1079.85, 5.15.0.1080.76, 5.15.0-1080.85, 5.15.0.1081.77, 5.15.0-1081.87, 5.15.0-1081.87~20.04.1, 5.15.0.1081.87~20.04.1, 6.8.0-62.65, 6.8.0-62.65.1, 6.8.0-62.65.1~22.04.1, 6.8.0-1013.15, 6.8.0-1026.30, 6.8.0-1027.27, 6.8.0-1029.29, 6.8.0-1029.32, 6.8.0-1029.32.1, 6.8.0-1029.32~22.04.1, 6.8.0-1030.32, 6.8.0-1030.32+1, 6.8.0-1030.32~22.04.1, 6.8.0-1030.32~22.04.1+1, 6.11.0-28.28, 6.11.0-28.28~24.04.1, 6.11.0-1011.11, 6.11.0-1014.14, 6.11.0-1015.16, 6.11.0-1016.16, 6.11.0-1016.16~24.04.1, 6.11.0-1017.18
linux-hwe-5.15 (Ubuntu package) - addressed in versions 5.15.0.142.152~20.04.1, 5.15.0-142.152~20.04.1
linux-aws (Ubuntu package) - addressed in versions 5.15.0-1026.26, 5.15.0.1026.28, 5.15.0.1078.76, 5.15.0-1078.81, 5.15.0-1079.85~20.04.1, 5.15.0.1079.85~20.04.1, 5.15.0.1084.86, 5.15.0-1084.91
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1037.37, 5.15.0-1037.37, 5.15.0.1089.87, 5.15.0-1089.98, 5.15.0-1089.98~20.04.1, 5.15.0.1089.98~20.04.1, 6.11.0-1018.18, 6.11.0-1018.18~24.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1050.53, 5.15.0-1050.54
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1077.79, 5.15.0.1077.81, 5.15.0.1084.88, 5.15.0-1084.93
linux-gke (Ubuntu package) - addressed in versions 5.15.0.1081.80, 5.15.0-1081.87
linux-gcp-fips (Ubuntu package) - addressed in versions 5.15.0.1083.73, 5.15.0-1083.92+fips1
linux-gcp (Ubuntu package) - addressed in versions 5.15.0.1083.79, 5.15.0-1083.92, 6.8.0-1031.33, 6.8.0-1031.33~22.04.1
linux-gcp-5.15 (Ubuntu package) - addressed in versions 5.15.0.1083.92~20.04.1, 5.15.0-1083.92~20.04.1
linux-aws-fips (Ubuntu package) - addressed in versions 5.15.0.1084.80, 5.15.0-1084.91+fips1
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0-1084.91~20.04.1, 5.15.0.1084.91~20.04.1
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1089.74, 5.15.0-1089.98+fips1
linux (Debian package) - update to 6.1.133-1
kernel-source-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-devel-coco - update to 6.4.0-15061.21.coco15sp6.1
reiserfs-kmp-coco-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-vdso-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-devel - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-devel-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-syms-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-debugsource - update to 6.4.0-15061.21.coco15sp6.1
reiserfs-kmp-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-debugsource - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-devel - update to 6.4.0-15061.21.coco15sp6.1
kernel-devel-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kernel-source-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
cluster-md-kmp-azure - update to 6.4.0-150600.8.37.1
ocfs2-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.37.1
cluster-md-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-devel - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kernel-azure-debugsource - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kernel-azure-optional - update to 6.4.0-150600.8.37.1
reiserfs-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-extra - update to 6.4.0-150600.8.37.1
dlm-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.37.1
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-devel-debuginfo - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-vdso - update to 6.4.0-150600.8.37.1
kernel-azure-vdso-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
dlm-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-debuginfo - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
ocfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
gfs2-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-syms-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
reiserfs-kmp-azure - update to 6.4.0-150600.8.37.1
kselftests-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-rt-vdso - update to 6.4.0-150600.10.39.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-extra - update to 6.4.0-150600.10.39.1
kernel-rt-debugsource - update to 6.4.0-150600.10.39.1
cluster-md-kmp-rt - update to 6.4.0-150600.10.39.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.39.1
reiserfs-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-devel-debuginfo - update to 6.4.0-150600.10.39.1
reiserfs-kmp-rt - update to 6.4.0-150600.10.39.1
gfs2-kmp-rt - update to 6.4.0-150600.10.39.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.39.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt_debug-vdso - update to 6.4.0-150600.10.39.1
kernel-rt_debug - update to 6.4.0-150600.10.39.1
kernel-rt - update to 6.4.0-150600.10.39.1
kernel-source-rt - update to 6.4.0-150600.10.39.1
kernel-devel-rt - update to 6.4.0-150600.10.39.1
kernel-rt-devel - update to 6.4.0-150600.10.39.1
kernel-rt-extra-debuginfo - update to 6.4.0-150600.10.39.1
kernel-syms-rt - update to 6.4.0-150600.10.39.1
kernel-rt_debug-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt_debug-devel - update to 6.4.0-150600.10.39.1
kernel-rt_debug-devel-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-debuginfo - update to 6.4.0-150600.10.39.1
ocfs2-kmp-rt - update to 6.4.0-150600.10.39.1
kernel-rt-optional - update to 6.4.0-150600.10.39.1
dlm-kmp-rt - update to 6.4.0-150600.10.39.1
kernel-rt_debug-debugsource - update to 6.4.0-150600.10.39.1
kselftests-kmp-rt - update to 6.4.0-150600.10.39.1
kernel-default-extra - update to 6.4.0-150700.53.3.1
kernel-default-livepatch - update to 6.4.0-150700.53.3.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
dlm-kmp-default - update to 6.4.0-150700.53.3.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
ocfs2-kmp-default - update to 6.4.0-150700.53.3.1
cluster-md-kmp-default - update to 6.4.0-150700.53.3.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
gfs2-kmp-default - update to 6.4.0-150700.53.3.1
kernel-default-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-debugsource - update to 6.4.0-150700.53.3.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
reiserfs-kmp-default - update to 6.4.0-150700.53.3.1
kernel-default - update to 6.4.0-150700.53.3.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.3.1
kernel-obs-build - update to 6.4.0-150700.53.3.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.3.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-devel - update to 6.4.0-150700.53.3.1
kernel-64kb - update to 6.4.0-150700.53.3.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.3.1
kernel-source - update to 6.4.0-150700.53.3.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-devel - update to 6.4.0-150700.53.3.1
kernel-devel - update to 6.4.0-150700.53.3.1
kernel-macros - update to 6.4.0-150700.53.3.1
kernel-zfcpdump - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.3.1
kernel-docs - update to 6.4.0-150700.53.3.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.3.1
kernel-syms - update to 6.4.0-150700.53.3.1
kernel-default-base - update to 6.4.0-150700.53.3.1.150700.17.2.1
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-64.67~22.04.1
linux-azure-nvidia (Ubuntu package) - update to 6.8.0-1018.19
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1027.28, 6.8.0-1027.28~22.04.1, 6.8.0-1029.33
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2024.25
linux-realtime (Ubuntu package) - update to 6.8.1-1023.24
linux-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1015.16, 6.11.0-1015.16~24.04.2
linux-oem-6.11 (Ubuntu package) - update to 6.11.0-1024.24

External References

Related Security Bulletins