Use-after-free in Linux kernel - CVE-2026-72069

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Main Vulnerability Database Vulnerabilities #VU143526

Use-after-free in Linux kernel - CVE-2026-72069

Published: August 16, 2026


Vulnerability identifier: #VU143526
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72069
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to a use-after-free in rt_spin_unlock(), rt_read_unlock(), and rt_write_unlock() when releasing RCU protection before completing unlock operations. A local user can trigger concurrent lock and RCU operations to execute arbitrary code.

The issue affects the RT spinlock and rwlock substitutions where unlock handling does not preserve the expected non-RT RCU protection semantics.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
SUSE Linux Enterprise Live Patching
Basesystem Module
Development Tools Module
Public Cloud Module
Legacy Module
openSUSE Leap
Ubuntu
kernel-livepatch-5_14_21-150400_24_240-default-debuginfo
kernel-livepatch-5_14_21-150400_24_240-default
kernel-livepatch-SLE15-SP4_Update_59-debugsource
kernel-livepatch-5_14_21-150500_55_189-default-debuginfo
kernel-livepatch-SLE15-SP5_Update_45-debugsource
kernel-livepatch-5_14_21-150500_55_189-default
kernel-livepatch-SLE15-SP6_Update_31-debugsource
kernel-livepatch-6_4_0-150600_23_135-default-debuginfo
kernel-livepatch-6_4_0-150600_23_135-default
kernel-livepatch-6_4_0-150700_53_81-default
kernel-livepatch-SLE15-SP7_Update_21-debugsource
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo
kernel-rt
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-source-rt
kernel-source
kernel-obs-build-debugsource
kernel-devel
kernel-syms
kernel-obs-build
kernel-macros
kernel-docs
cluster-md-kmp-default
gfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kernel-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb
kernel-default-devel-debuginfo
reiserfs-kmp-default
kernel-default-devel
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default
reiserfs-kmp-default-debuginfo
kernel-default-debugsource
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-default-livepatch-devel
kernel-default-livepatch
cluster-md-kmp-default-debuginfo
kernel-default-base
kernel-rt_debug-debugsource
kernel-rt-vdso
kernel-rt_debug-devel-debuginfo
kernel-rt-extra
kernel-rt_debug-vdso
kernel-rt-livepatch
kernel-rt-vdso-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt_debug-vdso-debuginfo
kernel-rt-devel-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-optional
ocfs2-kmp-rt-debuginfo
gfs2-kmp-rt
dlm-kmp-rt
kselftests-kmp-rt-debuginfo
reiserfs-kmp-rt
kernel-rt-extra-debuginfo
kernel-rt-livepatch-devel
kernel-rt-devel
kernel-syms-rt
cluster-md-kmp-rt
kselftests-kmp-rt
ocfs2-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-rt_debug-devel
kernel-rt-optional-debuginfo
dlm-kmp-rt-debuginfo
kernel-devel-rt
kernel-rt_debug
kselftests-kmp-64kb
kselftests-kmp-default-debuginfo
kselftests-kmp-default
kselftests-kmp-64kb-debuginfo
dlm-kmp-64kb
ocfs2-kmp-64kb
cluster-md-kmp-64kb-debuginfo
reiserfs-kmp-64kb
ocfs2-kmp-64kb-debuginfo
gfs2-kmp-64kb
dlm-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-optional-debuginfo
kernel-64kb-extra
reiserfs-kmp-64kb-debuginfo
gfs2-kmp-64kb-debuginfo
kernel-64kb-optional
kernel-64kb-extra-debuginfo
kernel-obs-qa
kernel-kvmsmall
kernel-docs-html
kernel-source-vanilla
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-default-vdso
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel
kernel-default-extra-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel-debuginfo
kernel-default-optional-debuginfo
kernel-default-optional
kernel-default-extra
kernel-default-base-rebuild
kernel-debug-vdso
kernel-debug-vdso-debuginfo
kernel-debug
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-debug-devel
kernel-debug-debuginfo
kernel-azure
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure-debuginfo
kernel-azure-debugsource
kernel (Red Hat package)
linux-nvidia-tegra (Ubuntu package)
linux (Ubuntu package)
linux-gke (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

How to mitigate CVE-2026-72069

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-livepatch-5_14_21-150400_24_240-default-debuginfo - update to 1-150400.9.5.1
kernel-livepatch-5_14_21-150400_24_240-default - update to 1-150400.9.5.1
kernel-livepatch-SLE15-SP4_Update_59-debugsource - update to 1-150400.9.5.1
kernel-livepatch-5_14_21-150500_55_189-default-debuginfo - update to 1-150500.11.5.3
kernel-livepatch-SLE15-SP5_Update_45-debugsource - update to 1-150500.11.5.3
kernel-livepatch-5_14_21-150500_55_189-default - update to 1-150500.11.5.3
kernel-livepatch-SLE15-SP6_Update_31-debugsource - update to 1-150600.13.3.4
kernel-livepatch-6_4_0-150600_23_135-default-debuginfo - update to 1-150600.13.3.4
kernel-livepatch-6_4_0-150600_23_135-default - update to 1-150600.13.3.4
kernel-livepatch-6_4_0-150700_53_81-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_21-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo - update to 1-150700.15.3.1
kernel-rt - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-rt-debuginfo - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-rt-debugsource - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-source-rt - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-source - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-obs-build-debugsource - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-devel - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-syms - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-obs-build - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-macros - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-docs - addressed in versions 5.14.21-150400.24.240.1, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
cluster-md-kmp-default - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
gfs2-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
dlm-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
dlm-kmp-default - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
ocfs2-kmp-default - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-64kb-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-64kb-devel-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-64kb-devel - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-64kb-debugsource - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-64kb - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-devel-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
reiserfs-kmp-default - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-devel - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
gfs2-kmp-default - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
ocfs2-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-debugsource - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-zfcpdump-debugsource - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-zfcpdump-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-zfcpdump - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-livepatch - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
cluster-md-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-base - addressed in versions 5.14.21-150400.24.240.2.150400.24.120.2, 5.14.21-150500.55.189.1.150500.6.87.4, 6.4.0-150600.23.135.1.150600.12.62.4, 6.4.0-150700.53.81.1.150700.17.45.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.161.1
kernel-rt-vdso - update to 5.14.21-150500.13.161.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-extra - update to 5.14.21-150500.13.161.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.161.1
kernel-rt-livepatch - update to 5.14.21-150500.13.161.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.161.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.161.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-optional - update to 5.14.21-150500.13.161.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
gfs2-kmp-rt - update to 5.14.21-150500.13.161.1
dlm-kmp-rt - update to 5.14.21-150500.13.161.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.161.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.161.1
kernel-rt-devel - update to 5.14.21-150500.13.161.1
kernel-syms-rt - update to 5.14.21-150500.13.161.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.161.1
kselftests-kmp-rt - update to 5.14.21-150500.13.161.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.161.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.161.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.161.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-devel-rt - update to 5.14.21-150500.13.161.1
kernel-rt_debug - update to 5.14.21-150500.13.161.1
kselftests-kmp-64kb - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kselftests-kmp-default-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kselftests-kmp-default - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kselftests-kmp-64kb-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
dlm-kmp-64kb - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
ocfs2-kmp-64kb - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
cluster-md-kmp-64kb-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
reiserfs-kmp-64kb - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
ocfs2-kmp-64kb-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
gfs2-kmp-64kb - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
dlm-kmp-64kb-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
cluster-md-kmp-64kb - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-64kb-optional-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-64kb-extra - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
reiserfs-kmp-64kb-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
gfs2-kmp-64kb-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-64kb-optional - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-64kb-extra-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-obs-qa - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-kvmsmall - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-docs-html - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-source-vanilla - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-kvmsmall-vdso-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-default-vdso-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-kvmsmall-vdso - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-default-vdso - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-kvmsmall-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-kvmsmall-devel - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-default-extra-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debugsource - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-kvmsmall-devel-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-default-optional-debuginfo - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-default-optional - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1
kernel-default-extra - addressed in versions 5.14.21-150500.55.189.1, 6.4.0-150600.23.135.1, 6.4.0-150700.53.81.1
kernel-default-base-rebuild - addressed in versions 5.14.21-150500.55.189.1.150500.6.87.4, 6.4.0-150600.23.135.1.150600.12.62.4
kernel-debug-vdso - update to 6.4.0-150600.23.135.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.135.1
kernel-debug - update to 6.4.0-150600.23.135.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.135.1
kernel-debug-debugsource - update to 6.4.0-150600.23.135.1
kernel-debug-devel - update to 6.4.0-150600.23.135.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.135.1
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-devel-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-debugsource - update to 6.4.0-150700.53.81.1
kernel (Red Hat package) - update to 6.12.0-211.50.1.el10_2
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
linux (Ubuntu package) - addressed in versions 7.0.0-34.34~24.04.1, 7.0.0-34.34, 7.0.0-34.34.1, 7.0.0-1012.12~24.04.1, 7.0.0-1013.13~24.04.1, 7.0.0-1013.13, 7.0.0-1014.14, 7.0.0-1020.20
linux-gke (Ubuntu package) - update to 7.0.0-1007.8
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1012.12~24.04.1
linux-gcp (Ubuntu package) - addressed in versions 7.0.0-1013.13~24.04.1, 7.0.0-1013.13, 7.0.0-1014.14
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

External References

Related Security Bulletins