Improper locking in Linux kernel - CVE-2025-21886

Vulnerability identifier: #VU106119

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-2025-21886

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 destroy_unused_implicit_child_mr() function in drivers/infiniband/hw/mlx5/odp.c. A local user can perform a denial of service (DoS) attack.

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

Install update from vendor's website.

Linux kernel - update to 6.12.18
APEX Cloud Platform for Microsoft Azure - update to 01.05.01.00
kernel-livepatch-6_4_0-150600_10_34-rt-debuginfo - 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-SLE15-SP6-RT_Update_10-debugsource - update to 1-150600.1.5.1
kernel-livepatch-6_4_0-150600_23_47-default-debuginfo - 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 - update to 1-150600.13.5.1
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
kernel-rt - addressed in versions 5.14.21-150400.15.118.1, 6.4.0-150600.10.34.1
kernel-rt-debugsource - addressed in versions 5.14.21-150400.15.118.1, 6.4.0-150600.10.34.1
kernel-rt-debuginfo - addressed in versions 5.14.21-150400.15.118.1, 6.4.0-150600.10.34.1
kernel-source-rt - addressed in versions 5.14.21-150400.15.118.1, 6.4.0-150600.10.34.1
kernel-coco_debug-debugsource - 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_debug-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-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 - addressed in versions 6.4.0-150600.8.34.1, 6.4.0-150700.20.3.1
cluster-md-kmp-azure - update to 6.4.0-150600.8.34.2
reiserfs-kmp-azure - update to 6.4.0-150600.8.34.2
ocfs2-kmp-azure - update to 6.4.0-150600.8.34.2
kselftests-kmp-azure - update to 6.4.0-150600.8.34.2
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.34.2
gfs2-kmp-azure - update to 6.4.0-150600.8.34.2
kernel-azure-devel - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.34.2
kernel-azure-debuginfo - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
kernel-source-azure - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
kernel-devel-azure - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
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 - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
dlm-kmp-azure - update to 6.4.0-150600.8.34.2
kernel-azure-debugsource - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
reiserfs-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 - addressed in versions 6.4.0-150600.8.34.2, 6.4.0-150700.20.3.1
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-extra - update to 6.4.0-150600.8.34.2
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.34.2
ocfs2-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-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
kernel-rt-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
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
cluster-md-kmp-rt - update to 6.4.0-150600.10.34.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt_debug - 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
ocfs2-kmp-rt - update to 6.4.0-150600.10.34.1
reiserfs-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
kselftests-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
dlm-kmp-rt - 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-debuginfo - update to 6.4.0-150600.10.34.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.34.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.34.1
kernel-syms-rt - update to 6.4.0-150600.10.34.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.47.1, 6.4.0-150700.53.3.1
dtb-sprd - update to 6.4.0-150600.23.47.1
kernel-obs-qa - update to 6.4.0-150600.23.47.1
dtb-rockchip - update to 6.4.0-150600.23.47.1
kernel-docs - addressed in versions 6.4.0-150600.23.47.1, 6.4.0-150700.53.3.1
dtb-renesas - update to 6.4.0-150600.23.47.1
dtb-apple - update to 6.4.0-150600.23.47.1
dtb-apm - update to 6.4.0-150600.23.47.1
dtb-aarch64 - update to 6.4.0-150600.23.47.1
dtb-hisilicon - update to 6.4.0-150600.23.47.1
dtb-mediatek - update to 6.4.0-150600.23.47.1
dtb-amd - update to 6.4.0-150600.23.47.1
dtb-xilinx - update to 6.4.0-150600.23.47.1
dtb-amazon - 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
dtb-broadcom - 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-qcom - update to 6.4.0-150600.23.47.1
dtb-nvidia - update to 6.4.0-150600.23.47.1
kernel-syms - addressed in versions 6.4.0-150600.23.47.1, 6.4.0-150700.53.3.1
kernel-docs-html - update to 6.4.0-150600.23.47.1
kernel-obs-build - addressed in versions 6.4.0-150600.23.47.1, 6.4.0-150700.53.3.1
dtb-exynos - update to 6.4.0-150600.23.47.1
dtb-freescale - update to 6.4.0-150600.23.47.1
dtb-cavium - update to 6.4.0-150600.23.47.1
dtb-amlogic - update to 6.4.0-150600.23.47.1
dtb-arm - update to 6.4.0-150600.23.47.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.47.2
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-64kb - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-64kb-optional - update to 6.4.0-150600.23.47.2
gfs2-kmp-64kb - 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
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
kernel-source-vanilla - update to 6.4.0-150600.23.47.2
reiserfs-kmp-64kb - update to 6.4.0-150600.23.47.2
kernel-kvmsmall-vdso-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 - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.47.2
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kselftests-kmp-default - update to 6.4.0-150600.23.47.2
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
gfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
cluster-md-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
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-debug-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-vdso - update to 6.4.0-150600.23.47.2
kernel-debug-devel - update to 6.4.0-150600.23.47.2
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.47.2
kernel-debug-debugsource - update to 6.4.0-150600.23.47.2
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.47.2
kernel-debug - update to 6.4.0-150600.23.47.2
kernel-source - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-devel - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
cluster-md-kmp-default - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.47.2
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-64kb-optional-debuginfo - 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 - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.47.2
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-kvmsmall - update to 6.4.0-150600.23.47.2
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-macros - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
dlm-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-devel - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
dlm-kmp-default - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-optional - update to 6.4.0-150600.23.47.2
ocfs2-kmp-default - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-devel-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-debugsource - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
ocfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.47.2, 6.4.0-150700.53.3.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.47.2.150600.12.20.2
kernel-default-base - addressed in versions 6.4.0-150600.23.47.2.150600.12.20.2, 6.4.0-150700.53.3.1.150700.17.2.1

• https://git.kernel.org/stable/c/3d8c6f26893d55fab218ad086719de1fc9bb86ba
• https://git.kernel.org/stable/c/a095ede2daca49d15e74d66d014883f2fa8bb924
• https://git.kernel.org/stable/c/cb96ae783e7249e8e5a50c22952c0bb2983133df
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.18

• Improper locking in Linux kernel hw mlx5 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
• 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