Out-of-bounds write in Linux kernel - CVE-2026-43125

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Main Vulnerability Database Vulnerabilities #VU130614

Out-of-bounds write in Linux kernel - CVE-2026-43125

Published: May 7, 2026


Vulnerability identifier: #VU130614
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-43125
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in dlm_search_rsb_tree() when processing network messages with an excessive resource name length. A remote attacker can send a specially crafted network message to cause a denial of service.

The length value originates from the len parameter in dlm_dump_rsb_name().


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Micro
SUSE Linux Micro Extras
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Anolis OS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
SUSE Linux Enterprise Live Patching
Legacy Module
Public Cloud Module
SUSE Real Time Module
Development Tools Module
Basesystem Module
openEuler
Ubuntu
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kpatch-patch-4_18_0-477_143_1 (Red Hat package)
kpatch-patch-5_14_0-284_172_1 (Red Hat package)
kpatch-patch-5_14_0-687_10_1 (Red Hat package)
kpatch-patch-5_14_0-427_126_1 (Red Hat package)
kpatch-patch-5_14_0-570_116_1 (Red Hat package)
kgraft-patch-4_12_14-122_328-default
kpatch-patch-4_18_0-477_130_1 (Red Hat package)
kpatch-patch-5_14_0-284_158_1 (Red Hat package)
kpatch-patch-5_14_0-427_113_1 (Red Hat package)
kpatch-patch-5_14_0-570_94_1 (Red Hat package)
kpatch-patch-4_18_0-477_120_1 (Red Hat package)
kpatch-patch-5_14_0-284_148_1 (Red Hat package)
kpatch-patch-4_18_0-477_107_1 (Red Hat package)
kpatch-patch-5_14_0-427_100_1 (Red Hat package)
kpatch-patch-5_14_0-570_66_1 (Red Hat package)
kpatch-patch-5_14_0-284_134_1 (Red Hat package)
kpatch-patch-5_14_0-570_39_1 (Red Hat package)
kpatch-patch-5_14_0-427_84_1 (Red Hat package)
kpatch-patch-4_18_0-477_97_1 (Red Hat package)
kpatch-patch-5_14_0-284_117_1 (Red Hat package)
kpatch-patch-5_14_0-427_68_2 (Red Hat package)
kpatch-patch-5_14_0-570_17_1 (Red Hat package)
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource
kernel-livepatch-6_4_0-150700_7_75-rt
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo
kernel-livepatch-SLE15-SP7_Update_21-debugsource
kernel-livepatch-6_4_0-150700_53_81-default
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo
kernel (Red Hat package)
kernel-rt (Red Hat package)
dlm-kmp-default
kernel-default-devel-debuginfo
kernel-default-base
kernel-default-devel
cluster-md-kmp-default
gfs2-kmp-default
kernel-devel
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
kernel-default-debugsource
ocfs2-kmp-default
kernel-default-base-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
kernel-default
kernel-default-kgraft
kernel-default-debuginfo
kernel-default-kgraft-devel
kernel-macros
kernel-default-man
kernel-source
python3-perf
kernel-abi-stablelists
kernel-doc
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
bpftool-debuginfo
python3-perf-debuginfo
perf-debuginfo
kernel-tools-devel
kernel-tools-debuginfo
kernel-debugsource
kernel-debuginfo
kernel-64kb
kernel-default-livepatch
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-rt-livepatch
kernel-64kb-debugsource
kernel-64kb-devel
kernel-obs-build
kernel-obs-build-debugsource
kernel-rt-debugsource
kernel-devel-rt
kernel-source-rt
kernel-kvmsmall
kernel-rt-debuginfo
kernel-rt
dlm-kmp-rt
ocfs2-kmp-rt
cluster-md-kmp-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-devel-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-devel
reiserfs-kmp-default-debuginfo
kernel-default-livepatch-devel
kernel-azure
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-64kb-devel-debuginfo
reiserfs-kmp-default
kernel-docs
kernel-zfcpdump
kernel-64kb-debuginfo
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-extra-modules
linux-hwe-6.17 (Ubuntu package)
linux (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-raspi (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
IBM DataPower Gateway

How to mitigate CVE-2026-43125

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
IBM DataPower Gateway - update to 11.0.0.3
kpatch-patch-4_18_0-477_143_1 (Red Hat package) - update to 1-5.el8_8
kpatch-patch-5_14_0-284_172_1 (Red Hat package) - update to 1-6.el9_2
kpatch-patch-5_14_0-687_10_1 (Red Hat package) - update to 1-6.el9_8
kpatch-patch-5_14_0-427_126_1 (Red Hat package) - update to 1-7.el9_4
kpatch-patch-5_14_0-570_116_1 (Red Hat package) - update to 1-7.el9_6
kgraft-patch-4_12_14-122_328-default - update to 1-8.5.1
kpatch-patch-4_18_0-477_130_1 (Red Hat package) - update to 1-9.el8_8
kpatch-patch-5_14_0-284_158_1 (Red Hat package) - update to 1-9.el9_2
kpatch-patch-5_14_0-427_113_1 (Red Hat package) - update to 1-10.el9_4
kpatch-patch-5_14_0-570_94_1 (Red Hat package) - update to 1-10.el9_6
kpatch-patch-4_18_0-477_120_1 (Red Hat package) - update to 1-11.el8_8
kpatch-patch-5_14_0-284_148_1 (Red Hat package) - update to 1-11.el9_2
kpatch-patch-4_18_0-477_107_1 (Red Hat package) - update to 1-12.el8_8
kpatch-patch-5_14_0-427_100_1 (Red Hat package) - update to 1-12.el9_4
kpatch-patch-5_14_0-570_66_1 (Red Hat package) - update to 1-12.el9_6
kpatch-patch-5_14_0-284_134_1 (Red Hat package) - update to 1-13.el9_2
kpatch-patch-5_14_0-570_39_1 (Red Hat package) - update to 1-13.el9_6
kpatch-patch-5_14_0-427_84_1 (Red Hat package) - update to 1-14.el9_4
kpatch-patch-4_18_0-477_97_1 (Red Hat package) - update to 1-16.el8_8
kpatch-patch-5_14_0-284_117_1 (Red Hat package) - update to 1-19.el9_2
kpatch-patch-5_14_0-427_68_2 (Red Hat package) - update to 1-19.el9_4
kpatch-patch-5_14_0-570_17_1 (Red Hat package) - update to 1-22.el9_6
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_75-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_21-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo - update to 1-150700.15.3.1
kernel (Red Hat package) - addressed in versions 3.10.0-1160.154.1.el7, 4.18.0-305.201.1.el8_4, 4.18.0-372.198.1.el8_6, 4.18.0-477.150.1.el8_8, 5.14.0-284.178.1.el9_2, 5.14.0-427.136.1.el9_4, 5.14.0-687.15.1.el9_8
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.155.1.rt56.1307.el7, 4.18.0-553.132.1.rt7.473.el8_10, 5.14.0-284.178.1.rt14.463.el9_2
dlm-kmp-default - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-base - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1.21.35, 6.4.0-52.1.21.36, 6.4.0-150700.53.81.1.150700.17.45.1
kernel-default-devel - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
gfs2-kmp-default - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
kernel-devel - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
kernel-default-debugsource - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
kernel-default-base-debuginfo - update to 4.12.14-122.328.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 6.4.0-150700.53.81.1
kernel-syms - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-kgraft - update to 4.12.14-122.328.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-kgraft-devel - update to 4.12.14-122.328.1
kernel-macros - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-man - update to 4.12.14-122.328.1
kernel-source - addressed in versions 4.12.14-122.328.1, 6.4.0-52.1, 6.4.0-150700.53.81.1
python3-perf - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-abi-stablelists - update to 4.18.0-553.132.1.0.1
kernel-doc - update to 4.18.0-553.132.1.0.1
perf - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-tools-libs-devel - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-tools-libs - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-tools - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-modules-extra - update to 4.18.0-553.132.1.0.1
kernel-modules - update to 4.18.0-553.132.1.0.1
kernel-headers - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-devel - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-debug-modules-extra - update to 4.18.0-553.132.1.0.1
kernel-debug-modules - update to 4.18.0-553.132.1.0.1
kernel-debug-devel - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-debug-core - update to 4.18.0-553.132.1.0.1
kernel-debug - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel-cross-headers - update to 4.18.0-553.132.1.0.1
kernel-core - update to 4.18.0-553.132.1.0.1
kernel - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
bpftool - addressed in versions 4.18.0-553.132.1.0.1, 6.6.102-6
kernel - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
bpftool-debuginfo - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
python3-perf-debuginfo - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
python3-perf - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
perf-debuginfo - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
perf - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-tools-devel - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-tools-debuginfo - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-tools - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-source - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-headers - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-devel - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-debugsource - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-debuginfo - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
bpftool - addressed in versions 5.10.0-318.0.0.221, 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-64kb - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-livepatch - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debugsource - update to 6.4.0-52.1
kernel-kvmsmall-debuginfo - update to 6.4.0-52.1
kernel-rt-livepatch - update to 6.4.0-52.1
kernel-64kb-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-64kb-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-obs-build - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-rt-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-devel-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-source-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-kvmsmall - update to 6.4.0-52.1
kernel-rt-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
dlm-kmp-rt - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.75.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
kernel-syms-rt - update to 6.4.0-150700.7.75.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.75.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.75.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
kernel-rt-devel - update to 6.4.0-150700.7.75.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.81.1
kernel-azure - update to 6.4.0-150700.53.81.1
kernel-azure-devel - update to 6.4.0-150700.53.81.1
kernel-azure-debugsource - update to 6.4.0-150700.53.81.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.81.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.81.1
kernel-default-extra - update to 6.4.0-150700.53.81.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.81.1
reiserfs-kmp-default - update to 6.4.0-150700.53.81.1
kernel-docs - update to 6.4.0-150700.53.81.1
kernel-zfcpdump - update to 6.4.0-150700.53.81.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.81.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.81.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.81.1
kernel-extra-modules - update to 6.6.0-145.3.17.150
linux-hwe-6.17 (Ubuntu package) - update to 6.17.0-40.40~24.04.1
linux (Ubuntu package) - update to 6.17.0-40.40
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-raspi (Ubuntu package) - update to 6.17.0-1021.21
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1026.26
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1028.28

External References

Related Security Bulletins