Improper locking in Linux kernel - CVE-2025-21951

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Main Vulnerability Database Vulnerabilities #VU106753

Improper locking in Linux kernel - CVE-2025-21951

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


Vulnerability identifier: #VU106753
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-2025-21951
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 mhi_pci_recovery_work() function in drivers/bus/mhi/host/pci_generic.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 Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Confidential Computing Module
Public Cloud Module
Basesystem Module
Development Tools Module
Legacy 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-6_4_0-150700_53_3-default
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_1-debugsource
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-coco_debug-devel
kernel-source-coco
kernel-devel-coco
reiserfs-kmp-coco-debuginfo
kernel-coco-vdso-debuginfo
kernel-coco-debuginfo
kernel-coco_debug-devel-debuginfo
kernel-coco_debug-debugsource
reiserfs-kmp-coco
kernel-coco-debugsource
kernel-coco-devel
kernel-syms-coco
kernel-coco_debug-debuginfo
kernel-coco
kernel-coco_debug
cluster-md-kmp-azure
kernel-devel-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
kselftests-kmp-azure-debuginfo
kselftests-kmp-azure
kernel-source-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure
dlm-kmp-azure-debuginfo
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
ocfs2-kmp-azure-debuginfo
gfs2-kmp-azure
kernel-syms-azure
reiserfs-kmp-azure
dlm-kmp-rt
cluster-md-kmp-rt
kernel-rt_debug-debugsource
kselftests-kmp-rt
kernel-rt_debug-devel
kernel-rt-vdso
kernel-rt-extra
cluster-md-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kselftests-kmp-rt-debuginfo
kernel-rt-livepatch-devel
kernel-rt-debugsource
kernel-rt_debug-vdso-debuginfo
gfs2-kmp-rt
reiserfs-kmp-rt
kernel-rt-devel-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt-optional-debuginfo
kernel-rt-vdso-debuginfo
dlm-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
cluster-md-kmp-default
kernel-default-livepatch
kernel-default-extra-debuginfo
kernel-default-extra
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default
kernel-obs-build
dlm-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-debuginfo
kernel-default-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-default
kernel-source
kernel-64kb
kernel-default-livepatch-devel
kernel-syms
kernel-obs-build-debugsource
kernel-docs
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-macros
kernel-devel
kernel-default-devel
kernel-default-devel-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel
kernel-default-base
kernel
bpftool
bpftool-debuginfo
perf
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf-debuginfo
python3-perf
python3-perf-debuginfo
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (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)

How to mitigate CVE-2025-21951

Install update from vendor's website.

Linux kernel - addressed in versions 5.15.179, 6.1.131, 6.6.83, 6.12.19, 6.13.7, 6.14
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-6_4_0-150700_53_3-default - 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-SLE15-SP7_Update_1-debugsource - update to 1-150700.15.3.1
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, 6.8.0-84.84, 6.8.0-84.84.1, 6.8.0-84.84.1~22.04.1, 6.8.0-1023.25, 6.8.0-1036.40, 6.8.0-1039.41, 6.8.0-1040.42, 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, 6.8.0-1036.42~22.04.1, 6.8.0-1038.44, 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
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-coco_debug-devel - update to 6.4.0-15061.21.coco15sp6.1
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-vdso-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-debuginfo - 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-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-devel - update to 6.4.0-15061.21.coco15sp6.1
kernel-syms-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug - update to 6.4.0-15061.21.coco15sp6.1
cluster-md-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-devel-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
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
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kselftests-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-source-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
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
kernel-azure-devel-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
dlm-kmp-rt - update to 6.4.0-150600.10.39.1
cluster-md-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-rt_debug-devel - update to 6.4.0-150600.10.39.1
kernel-rt-vdso - update to 6.4.0-150600.10.39.1
kernel-rt-extra - update to 6.4.0-150600.10.39.1
cluster-md-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
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.39.1
kernel-rt-debugsource - update to 6.4.0-150600.10.39.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.39.1
gfs2-kmp-rt - update to 6.4.0-150600.10.39.1
reiserfs-kmp-rt - 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-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.39.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-optional - 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-vdso - 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-zfcpdump - update to 6.4.0-150700.53.3.1
cluster-md-kmp-default - update to 6.4.0-150700.53.3.1
kernel-default-livepatch - update to 6.4.0-150700.53.3.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-extra - 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
kernel-obs-build - 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-source - 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-syms - update to 6.4.0-150700.53.3.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.3.1
kernel-docs - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.3.1
kernel-macros - update to 6.4.0-150700.53.3.1
kernel-devel - update to 6.4.0-150700.53.3.1
kernel-default-devel - update to 6.4.0-150700.53.3.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.3.1
kernel-64kb-devel - 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
kernel - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
bpftool - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
bpftool-debuginfo - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
perf - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-debuginfo - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-debugsource - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-devel - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-headers - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-source - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-tools - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-tools-debuginfo - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
kernel-tools-devel - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
perf-debuginfo - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
python3-perf - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
python3-perf-debuginfo - addressed in versions 6.6.0-103.0.0.95, 6.6.0-103.0.0.106
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-84.84~22.04.1, 6.8.0-85.85~22.04.1
linux-azure-nvidia (Ubuntu package) - update to 6.8.0-1025.27
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1037.37, 6.8.0-1037.37~22.04.1
linux-oracle (Ubuntu package) - update to 6.8.0-1037.38
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1037.38~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1039.41~22.04.1, 6.8.0-1040.42~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1039.42, 6.8.0-1039.42.1, 6.8.0-1039.42~22.04.1
linux-raspi (Ubuntu package) - update to 6.8.0-1039.43
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2031.32
linux-realtime (Ubuntu package) - update to 6.8.1-1034.35
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1034.35~22.04.1
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