Use-after-free in Linux kernel - CVE-2026-68162

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Main Vulnerability Database Vulnerabilities #VU142149

Use-after-free in Linux kernel - CVE-2026-68162

Published: August 12, 2026


Vulnerability identifier: #VU142149
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-2026-68162
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the SCTP auth_enable sysctl handler when handling writes to an already opened sysctl file during network namespace teardown. A local user can write to the auth_enable sysctl entry to cause a denial of service.

The issue is exposed during initialization before the SCTP control socket exists and during teardown after the control socket has been released.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Micro
SUSE Linux Micro Extras
SUSE Linux Enterprise Live Patching
Basesystem Module
SUSE Real Time Module
Public Cloud Module
Legacy Module
Development Tools Module
openSUSE Leap
Ubuntu
linux (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
linux-realtime (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-ibm (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-fde (Ubuntu package)
kgraft-patch-4_12_14-122_333-default
kernel-livepatch-6_4_0-150600_23_138-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_32-debugsource
kernel-livepatch-6_4_0-150600_23_138-default
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_75-rt
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo
kernel-livepatch-6_4_0-150700_53_81-default
kernel-livepatch-SLE15-SP7_Update_21-debugsource
kernel-default-devel
kernel-default-man
kernel-devel
kernel-source
kernel-macros
kernel-default-devel-debuginfo
kernel-default
gfs2-kmp-default
kernel-default-kgraft
kernel-default-debugsource
kernel-default-kgraft-devel
kernel-default-debuginfo
dlm-kmp-default
dlm-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
kernel-default-base-debuginfo
kernel-syms
kernel-default-base
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
kernel-rt-livepatch
kernel-64kb
kernel-kvmsmall-debuginfo
kernel-obs-build-debugsource
kernel-obs-build
kernel-64kb-devel
kernel-64kb-debugsource
kernel-kvmsmall-debugsource
kernel-default-livepatch
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-kvmsmall
kernel-source-rt
kernel-devel-rt
kernel-rt
reiserfs-kmp-64kb-debuginfo
dtb-hisilicon
reiserfs-kmp-64kb
gfs2-kmp-64kb-debuginfo
dtb-rockchip
dtb-amd
dtb-sprd
kernel-64kb-debuginfo
dtb-apple
dtb-cavium
dtb-socionext
ocfs2-kmp-64kb
dtb-mediatek
kselftests-kmp-64kb
kselftests-kmp-64kb-debuginfo
kernel-64kb-optional
cluster-md-kmp-64kb-debuginfo
dtb-altera
kernel-kvmsmall-devel-debuginfo
dtb-allwinner
dlm-kmp-64kb
dtb-amlogic
dtb-broadcom
dtb-freescale
dtb-nvidia
ocfs2-kmp-64kb-debuginfo
kernel-kvmsmall-devel
kernel-kvmsmall-vdso-debuginfo
kernel-debug-vdso-debuginfo
kernel-default-vdso
kernel-default-vdso-debuginfo
kernel-debug-vdso
kernel-kvmsmall-vdso
kernel-debug-devel
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-debug-devel-debuginfo
kernel-debug
dtb-aarch64
dtb-renesas
kernel-default-extra
kernel-obs-qa
kselftests-kmp-default-debuginfo
kernel-default-optional
kernel-default-extra-debuginfo
kernel-default-optional-debuginfo
kselftests-kmp-default
dtb-amazon
dtb-arm
dtb-apm
kernel-64kb-optional-debuginfo
dtb-qcom
kernel-64kb-extra-debuginfo
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
dtb-marvell
kernel-docs-html
kernel-source-vanilla
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-xilinx
dtb-lg
dtb-exynos
dlm-kmp-64kb-debuginfo
kernel-64kb-devel-debuginfo
gfs2-kmp-64kb
kernel-64kb-extra
cluster-md-kmp-64kb
kernel-default-livepatch-devel
kernel-docs
kernel-default-base-rebuild
kernel-rt-devel
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-devel-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-azure
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-devel-debuginfo
kernel-azure-debuginfo
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)

How to mitigate CVE-2026-68162

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 6.8.0-147.147, 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-aws (Ubuntu package) - update to 6.8.0-1067.70
linux-gcp (Ubuntu package) - update to 6.8.0-1071.79
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1071.79, 7.0.0-1016.16, 7.0.0-1017.17
linux-oracle (Ubuntu package) - update to 6.8.0-1064.67
linux-lowlatency (Ubuntu package) - update to 6.8.0-147.147.1
linux-gke (Ubuntu package) - update to 6.8.0-1066.74
linux-fips (Ubuntu package) - update to 6.8.0-147.147+fips1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1070.72, 6.8.0-1035.38
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-realtime (Ubuntu package) - update to 6.8.1-1062.63
linux-gkeop (Ubuntu package) - update to 6.8.0-1052.56
linux-ibm (Ubuntu package) - update to 6.8.0-1067.68
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
linux-aws-fips (Ubuntu package) - update to 6.8.0-1067.70+fips1
linux-azure-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
linux-azure-fde (Ubuntu package) - update to 6.8.0-1069.76
kgraft-patch-4_12_14-122_333-default - update to 1-8.3.3
kernel-livepatch-6_4_0-150600_23_138-default-debuginfo - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP6_Update_32-debugsource - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150600_23_138-default - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo - 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-SLE15-SP7-RT_Update_20-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo - 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-SLE15-SP7_Update_21-debugsource - update to 1-150700.15.3.1
kernel-default-devel - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-man - update to 4.12.14-122.333.2
kernel-devel - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-source - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-macros - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
gfs2-kmp-default - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-kgraft - update to 4.12.14-122.333.2
kernel-default-debugsource - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-kgraft-devel - update to 4.12.14-122.333.2
kernel-default-debuginfo - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
dlm-kmp-default - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-base-debuginfo - update to 4.12.14-122.333.2
kernel-syms - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-base - addressed in versions 4.12.14-122.333.2, 6.4.0-52.1.21.35, 6.4.0-52.1.21.36, 6.4.0-150600.23.138.1.150600.12.64.1, 6.4.0-150700.53.81.1.150700.17.45.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.333.2, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-rt-livepatch - update to 6.4.0-52.1
kernel-64kb - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-obs-build - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-64kb-devel - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-64kb-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1
kernel-default-livepatch - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-rt-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-rt-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-kvmsmall - addressed in versions 6.4.0-52.1, 6.4.0-150600.23.138.1
kernel-source-rt - 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-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
dtb-hisilicon - update to 6.4.0-150600.23.138.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.138.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
dtb-rockchip - update to 6.4.0-150600.23.138.1
dtb-amd - update to 6.4.0-150600.23.138.1
dtb-sprd - update to 6.4.0-150600.23.138.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
dtb-apple - update to 6.4.0-150600.23.138.1
dtb-cavium - update to 6.4.0-150600.23.138.1
dtb-socionext - update to 6.4.0-150600.23.138.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.138.1
dtb-mediatek - update to 6.4.0-150600.23.138.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.138.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
kernel-64kb-optional - update to 6.4.0-150600.23.138.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
dtb-altera - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.138.1
dtb-allwinner - update to 6.4.0-150600.23.138.1
dlm-kmp-64kb - update to 6.4.0-150600.23.138.1
dtb-amlogic - update to 6.4.0-150600.23.138.1
dtb-broadcom - update to 6.4.0-150600.23.138.1
dtb-freescale - update to 6.4.0-150600.23.138.1
dtb-nvidia - update to 6.4.0-150600.23.138.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.138.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.138.1
kernel-default-vdso - update to 6.4.0-150600.23.138.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.138.1
kernel-debug-vdso - update to 6.4.0-150600.23.138.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.138.1
kernel-debug-devel - update to 6.4.0-150600.23.138.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.138.1
kernel-debug-debugsource - update to 6.4.0-150600.23.138.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.138.1
kernel-debug - update to 6.4.0-150600.23.138.1
dtb-aarch64 - update to 6.4.0-150600.23.138.1
dtb-renesas - update to 6.4.0-150600.23.138.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-obs-qa - update to 6.4.0-150600.23.138.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.138.1
kernel-default-optional - update to 6.4.0-150600.23.138.1
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.138.1
kselftests-kmp-default - update to 6.4.0-150600.23.138.1
dtb-amazon - update to 6.4.0-150600.23.138.1
dtb-arm - update to 6.4.0-150600.23.138.1
dtb-apm - update to 6.4.0-150600.23.138.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.138.1
dtb-qcom - update to 6.4.0-150600.23.138.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.138.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
dtb-marvell - update to 6.4.0-150600.23.138.1
kernel-docs-html - update to 6.4.0-150600.23.138.1
kernel-source-vanilla - update to 6.4.0-150600.23.138.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
dtb-xilinx - update to 6.4.0-150600.23.138.1
dtb-lg - update to 6.4.0-150600.23.138.1
dtb-exynos - update to 6.4.0-150600.23.138.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.138.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.138.1
kernel-64kb-extra - update to 6.4.0-150600.23.138.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.138.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-docs - addressed in versions 6.4.0-150600.23.138.1, 6.4.0-150700.53.81.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.138.1.150600.12.64.1
kernel-rt-devel - update to 6.4.0-150700.7.75.1
cluster-md-kmp-rt-debuginfo - 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 - 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 - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.75.1
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-devel-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.81.1
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
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

External References

Related Security Bulletins