Improper locking in Linux kernel - CVE-2025-21819

Vulnerability identifier: #VU105147

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2025-21819

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to improper locking within the dmub_hw_lock_mgr_inbox0_cmd() function in drivers/gpu/drm/amd/display/dc/dce/dmub_hw_lock_mgr.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
Legacy Module
Confidential Computing Module
SUSE Linux Enterprise Live Patching
Development Tools Module
Basesystem Module
SUSE Real Time Module
Public Cloud Module
openSUSE Leap
APEX Cloud Platform for Microsoft Azure
kernel-livepatch-SLE15-SP6-RT_Update_10-debugsource
kernel-livepatch-6_4_0-150600_10_34-rt
kernel-livepatch-6_4_0-150600_10_34-rt-debuginfo
kernel-livepatch-6_4_0-150600_23_47-default
kernel-livepatch-SLE15-SP6_Update_10-debugsource
kernel-livepatch-6_4_0-150600_23_47-default-debuginfo
kernel-coco_debug-devel
kernel-coco_debug
kernel-coco
kernel-coco_debug-debuginfo
kernel-syms-coco
kernel-coco-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-source-coco
kernel-syms-azure
gfs2-kmp-azure-debuginfo
kernel-source-azure
kernel-devel-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure
dlm-kmp-azure
kernel-azure-debugsource
reiserfs-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
kernel-azure-optional
kernel-azure-devel-debuginfo
kselftests-kmp-azure-debuginfo
dlm-kmp-azure-debuginfo
kernel-azure-optional-debuginfo
kernel-azure-devel
gfs2-kmp-azure
kernel-azure-extra-debuginfo
cluster-md-kmp-azure
ocfs2-kmp-azure
reiserfs-kmp-azure
kernel-azure-debuginfo
kselftests-kmp-azure
ocfs2-kmp-azure-debuginfo
kernel-azure-extra
kernel-rt-devel-debuginfo
kernel-rt
kernel-rt_debug
kernel-source-rt
kernel-devel-rt
kernel-rt_debug-devel
cluster-md-kmp-rt
kernel-rt-debuginfo
kselftests-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
kernel-rt-optional-debuginfo
dlm-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-rt-vdso-debuginfo
reiserfs-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
reiserfs-kmp-rt
cluster-md-kmp-rt-debuginfo
kernel-rt-extra-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-rt-optional
kernel-rt_debug-vdso
kernel-rt-extra
kernel-rt-devel
kernel-rt-vdso
ocfs2-kmp-rt
kernel-rt_debug-debugsource
gfs2-kmp-rt
kernel-rt-debugsource
kselftests-kmp-rt
kernel-syms-rt
kernel-rt-livepatch-devel
kernel-rt_debug-vdso-debuginfo
dtb-apple
dtb-freescale
dtb-rockchip
kernel-obs-qa
dtb-sprd
kernel-obs-build-debugsource
dtb-arm
dtb-amlogic
dtb-cavium
dtb-renesas
dtb-apm
dtb-hisilicon
dtb-aarch64
dtb-amd
dtb-mediatek
dtb-amazon
dtb-xilinx
dtb-marvell
dtb-allwinner
dtb-lg
kernel-syms
kernel-docs-html
dtb-broadcom
kernel-docs
dtb-altera
dtb-socionext
dtb-exynos
dtb-qcom
kernel-obs-build
dtb-nvidia
kernel-64kb-debugsource
reiserfs-kmp-64kb-debuginfo
dlm-kmp-64kb-debuginfo
kernel-macros
kernel-source-vanilla
kernel-devel
kernel-64kb-optional
kernel-64kb-optional-debuginfo
kernel-source
kernel-debug
kernel-debug-devel-debuginfo
dlm-kmp-64kb
cluster-md-kmp-64kb
kernel-64kb
gfs2-kmp-64kb-debuginfo
ocfs2-kmp-64kb-debuginfo
ocfs2-kmp-64kb
gfs2-kmp-64kb
reiserfs-kmp-64kb
kernel-64kb-debuginfo
reiserfs-kmp-default
cluster-md-kmp-64kb-debuginfo
kernel-default-extra
kernel-default-devel
cluster-md-kmp-default
dlm-kmp-default-debuginfo
kernel-default-optional-debuginfo
gfs2-kmp-default
reiserfs-kmp-default-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-extra-debuginfo
kselftests-kmp-default
dlm-kmp-default
gfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-debug-vdso-debuginfo
kernel-debug-vdso
kernel-default-vdso
kernel-kvmsmall
kernel-64kb-extra-debuginfo
kernel-64kb-devel-debuginfo
kernel-kvmsmall-vdso
kselftests-kmp-64kb-debuginfo
kernel-64kb-extra
kernel-64kb-devel
kselftests-kmp-64kb
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-default-livepatch
kernel-debug-debugsource
kernel-debug-debuginfo
kernel-default-livepatch-devel
kernel-debug-devel
kernel-default
kernel-default-debugsource
ocfs2-kmp-default-debuginfo
kernel-default-devel-debuginfo
ocfs2-kmp-default
kernel-default-debuginfo
kernel-default-optional
kernel-default-base
kernel-default-base-rebuild

Install update from vendor's website.

Linux kernel - addressed in versions 6.1.129, 6.6.78, 6.12.14, 6.13.3, 6.14
APEX Cloud Platform for Microsoft Azure - update to 01.05.01.00
kernel-livepatch-SLE15-SP6-RT_Update_10-debugsource - update to 1-150600.1.5.1
kernel-livepatch-6_4_0-150600_10_34-rt - update to 1-150600.1.5.1
kernel-livepatch-6_4_0-150600_10_34-rt-debuginfo - update to 1-150600.1.5.1
kernel-livepatch-6_4_0-150600_23_47-default - update to 1-150600.13.5.1
kernel-livepatch-SLE15-SP6_Update_10-debugsource - update to 1-150600.13.5.1
kernel-livepatch-6_4_0-150600_23_47-default-debuginfo - update to 1-150600.13.5.1
kernel-coco_debug-devel - 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-devel - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-debugsource - update to 6.4.0-15061.21.coco15sp6.1
reiserfs-kmp-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-debugsource - 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-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-vdso-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
reiserfs-kmp-coco-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-devel-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-source-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-syms-azure - update to 6.4.0-150600.8.34.1
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
kernel-source-azure - update to 6.4.0-150600.8.34.2
kernel-devel-azure - update to 6.4.0-150600.8.34.2
kernel-azure-vdso - update to 6.4.0-150600.8.34.2
kernel-azure-vdso-debuginfo - update to 6.4.0-150600.8.34.2
kernel-azure - update to 6.4.0-150600.8.34.2
dlm-kmp-azure - update to 6.4.0-150600.8.34.2
kernel-azure-debugsource - update to 6.4.0-150600.8.34.2
reiserfs-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
cluster-md-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
kernel-azure-optional - update to 6.4.0-150600.8.34.2
kernel-azure-devel-debuginfo - update to 6.4.0-150600.8.34.2
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
dlm-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.34.2
kernel-azure-devel - update to 6.4.0-150600.8.34.2
gfs2-kmp-azure - update to 6.4.0-150600.8.34.2
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.34.2
cluster-md-kmp-azure - update to 6.4.0-150600.8.34.2
ocfs2-kmp-azure - update to 6.4.0-150600.8.34.2
reiserfs-kmp-azure - update to 6.4.0-150600.8.34.2
kernel-azure-debuginfo - update to 6.4.0-150600.8.34.2
kselftests-kmp-azure - update to 6.4.0-150600.8.34.2
ocfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
kernel-azure-extra - update to 6.4.0-150600.8.34.2
kernel-rt-devel-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt - update to 6.4.0-150600.10.34.1
kernel-rt_debug - update to 6.4.0-150600.10.34.1
kernel-source-rt - update to 6.4.0-150600.10.34.1
kernel-devel-rt - update to 6.4.0-150600.10.34.1
kernel-rt_debug-devel - update to 6.4.0-150600.10.34.1
cluster-md-kmp-rt - update to 6.4.0-150600.10.34.1
kernel-rt-debuginfo - update to 6.4.0-150600.10.34.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.34.1
dlm-kmp-rt - update to 6.4.0-150600.10.34.1
kernel-rt_debug-devel-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.34.1
reiserfs-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
reiserfs-kmp-rt - update to 6.4.0-150600.10.34.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt-extra-debuginfo - update to 6.4.0-150600.10.34.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt_debug-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt-optional - update to 6.4.0-150600.10.34.1
kernel-rt_debug-vdso - update to 6.4.0-150600.10.34.1
kernel-rt-extra - update to 6.4.0-150600.10.34.1
kernel-rt-devel - update to 6.4.0-150600.10.34.1
kernel-rt-vdso - update to 6.4.0-150600.10.34.1
ocfs2-kmp-rt - update to 6.4.0-150600.10.34.1
kernel-rt_debug-debugsource - update to 6.4.0-150600.10.34.1
gfs2-kmp-rt - update to 6.4.0-150600.10.34.1
kernel-rt-debugsource - update to 6.4.0-150600.10.34.1
kselftests-kmp-rt - update to 6.4.0-150600.10.34.1
kernel-syms-rt - update to 6.4.0-150600.10.34.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.34.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.34.1
dtb-apple - update to 6.4.0-150600.23.47.1
dtb-freescale - update to 6.4.0-150600.23.47.1
dtb-rockchip - update to 6.4.0-150600.23.47.1
kernel-obs-qa - update to 6.4.0-150600.23.47.1
dtb-sprd - update to 6.4.0-150600.23.47.1
kernel-obs-build-debugsource - update to 6.4.0-150600.23.47.1
dtb-arm - update to 6.4.0-150600.23.47.1
dtb-amlogic - update to 6.4.0-150600.23.47.1
dtb-cavium - update to 6.4.0-150600.23.47.1
dtb-renesas - update to 6.4.0-150600.23.47.1
dtb-apm - update to 6.4.0-150600.23.47.1
dtb-hisilicon - update to 6.4.0-150600.23.47.1
dtb-aarch64 - update to 6.4.0-150600.23.47.1
dtb-amd - update to 6.4.0-150600.23.47.1
dtb-mediatek - update to 6.4.0-150600.23.47.1
dtb-amazon - update to 6.4.0-150600.23.47.1
dtb-xilinx - update to 6.4.0-150600.23.47.1
dtb-marvell - update to 6.4.0-150600.23.47.1
dtb-allwinner - update to 6.4.0-150600.23.47.1
dtb-lg - update to 6.4.0-150600.23.47.1
kernel-syms - update to 6.4.0-150600.23.47.1
kernel-docs-html - update to 6.4.0-150600.23.47.1
dtb-broadcom - update to 6.4.0-150600.23.47.1
kernel-docs - update to 6.4.0-150600.23.47.1
dtb-altera - update to 6.4.0-150600.23.47.1
dtb-socionext - update to 6.4.0-150600.23.47.1
dtb-exynos - update to 6.4.0-150600.23.47.1
dtb-qcom - update to 6.4.0-150600.23.47.1
kernel-obs-build - update to 6.4.0-150600.23.47.1
dtb-nvidia - update to 6.4.0-150600.23.47.1
kernel-64kb-debugsource - update to 6.4.0-150600.23.47.2
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
kernel-macros - update to 6.4.0-150600.23.47.2
kernel-source-vanilla - update to 6.4.0-150600.23.47.2
kernel-devel - update to 6.4.0-150600.23.47.2
kernel-64kb-optional - update to 6.4.0-150600.23.47.2
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.47.2
kernel-source - update to 6.4.0-150600.23.47.2
kernel-debug - update to 6.4.0-150600.23.47.2
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.47.2
dlm-kmp-64kb - update to 6.4.0-150600.23.47.2
cluster-md-kmp-64kb - update to 6.4.0-150600.23.47.2
kernel-64kb - update to 6.4.0-150600.23.47.2
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
ocfs2-kmp-64kb - update to 6.4.0-150600.23.47.2
gfs2-kmp-64kb - update to 6.4.0-150600.23.47.2
reiserfs-kmp-64kb - update to 6.4.0-150600.23.47.2
kernel-64kb-debuginfo - update to 6.4.0-150600.23.47.2
reiserfs-kmp-default - update to 6.4.0-150600.23.47.2
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-extra - update to 6.4.0-150600.23.47.2
kernel-default-devel - update to 6.4.0-150600.23.47.2
cluster-md-kmp-default - update to 6.4.0-150600.23.47.2
dlm-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.47.2
gfs2-kmp-default - update to 6.4.0-150600.23.47.2
reiserfs-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-extra-debuginfo - update to 6.4.0-150600.23.47.2
kselftests-kmp-default - update to 6.4.0-150600.23.47.2
dlm-kmp-default - update to 6.4.0-150600.23.47.2
gfs2-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
cluster-md-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-devel - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.47.2
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.47.2
kernel-debug-vdso - update to 6.4.0-150600.23.47.2
kernel-default-vdso - update to 6.4.0-150600.23.47.2
kernel-kvmsmall - update to 6.4.0-150600.23.47.2
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.47.2
kernel-64kb-devel-debuginfo - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.47.2
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
kernel-64kb-extra - update to 6.4.0-150600.23.47.2
kernel-64kb-devel - update to 6.4.0-150600.23.47.2
kselftests-kmp-64kb - update to 6.4.0-150600.23.47.2
kernel-zfcpdump-debuginfo - update to 6.4.0-150600.23.47.2
kernel-zfcpdump-debugsource - update to 6.4.0-150600.23.47.2
kernel-zfcpdump - update to 6.4.0-150600.23.47.2
kernel-default-livepatch - update to 6.4.0-150600.23.47.2
kernel-debug-debugsource - update to 6.4.0-150600.23.47.2
kernel-debug-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-livepatch-devel - update to 6.4.0-150600.23.47.2
kernel-debug-devel - update to 6.4.0-150600.23.47.2
kernel-default - update to 6.4.0-150600.23.47.2
kernel-default-debugsource - update to 6.4.0-150600.23.47.2
ocfs2-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-devel-debuginfo - update to 6.4.0-150600.23.47.2
ocfs2-kmp-default - update to 6.4.0-150600.23.47.2
kernel-default-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-optional - update to 6.4.0-150600.23.47.2
kernel-default-base - update to 6.4.0-150600.23.47.2.150600.12.20.2
kernel-default-base-rebuild - update to 6.4.0-150600.23.47.2.150600.12.20.2

• https://git.kernel.org/stable/c/915697c2e69ac8d14dad498e6d6f43dbb7de3787
• https://git.kernel.org/stable/c/95c75578c420110c43791295985abb961d6dc033
• https://git.kernel.org/stable/c/a978864653e45d2671f99b09afcc1110e45d3dd9
• https://git.kernel.org/stable/c/dcc3f2c06d80da39eee742b51ddf0781affb260c
• https://git.kernel.org/stable/c/f245b400a223a71d6d5f4c72a2cb9b573a7fc2b6
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.129
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.14
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.78

• Improper locking in Linux kernel dc dce driver
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Dell APEX Cloud Platform for Microsoft Azure update for third-party components