Race condition within a thread in Linux kernel - CVE-2026-23120

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Main Vulnerability Database Vulnerabilities #VU122936

Race condition within a thread in Linux kernel - CVE-2026-23120

Published: February 16, 2026


Vulnerability identifier: #VU122936
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-23120
CWE-ID: CWE-366
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to corrupt data.

The vulnerability exists due to a data race within the l2tp_tunnel_del_work() function in net/l2tp/l2tp_core.c. A local user can corrupt data.


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 Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Basesystem Module
Development Tools Module
Legacy Module
Public Cloud Module
Ubuntu
openEuler
linux-gcp-5.15 (Ubuntu package)
kgraft-patch-4_12_14-122_299-default
kernel-livepatch-SLE15-SP7-RT_Update_11-debugsource
kernel-livepatch-6_4_0-150700_7_37-rt
kernel-livepatch-6_4_0-150700_7_37-rt-debuginfo
kernel-livepatch-6_4_0-150700_53_37-default-debuginfo
kernel-livepatch-6_4_0-150700_53_37-default
kernel-livepatch-SLE15-SP7_Update_11-debugsource
kernel-default-kgraft
gfs2-kmp-default-debuginfo
kernel-default-base
dlm-kmp-default-debuginfo
kernel-default-devel
ocfs2-kmp-default-debuginfo
kernel-default-base-debuginfo
kernel-default-debugsource
kernel-syms
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
kernel-default-man
kernel-devel
kernel-macros
kernel-source
kernel-default
dlm-kmp-default
kernel-default-debuginfo
gfs2-kmp-default
ocfs2-kmp-default
kernel-syms-rt
kernel-rt-debugsource
kernel-rt
kernel-source-rt
kernel-devel-rt
gfs2-kmp-rt-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt
cluster-md-kmp-rt
ocfs2-kmp-rt
kernel-rt-devel
kernel-rt-devel-debuginfo
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
dlm-kmp-rt
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-64kb
kernel-zfcpdump-debuginfo
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-azure
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-zfcpdump-debugsource
kernel-zfcpdump
bpftool
kernel-tools
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-headers
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
kernel
kernel-extra-modules
linux (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-fips (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-azure (Ubuntu package)
linux-ibm (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)

How to mitigate CVE-2026-23120

Install update from vendor's repository.

linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1106.115~20.04.1
kgraft-patch-4_12_14-122_299-default - update to 1-8.3.1
kernel-livepatch-SLE15-SP7-RT_Update_11-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_37-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_37-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_37-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_37-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_11-debugsource - update to 1-150700.15.3.1
kernel-default-kgraft - update to 4.12.14-122.299.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default-base - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1.150700.17.25.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default-devel - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default-base-debuginfo - update to 4.12.14-122.299.1
kernel-default-debugsource - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-syms - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default-kgraft-devel - update to 4.12.14-122.299.1
kernel-default-man - update to 4.12.14-122.299.1
kernel-devel - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-macros - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-source - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
dlm-kmp-default - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
gfs2-kmp-default - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.299.1, 6.4.0-150700.53.37.1
kernel-syms-rt - update to 6.4.0-150700.7.37.1
kernel-rt-debugsource - update to 6.4.0-150700.7.37.2
kernel-rt - update to 6.4.0-150700.7.37.2
kernel-source-rt - update to 6.4.0-150700.7.37.2
kernel-devel-rt - update to 6.4.0-150700.7.37.2
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
kernel-rt-debuginfo - update to 6.4.0-150700.7.37.2
gfs2-kmp-rt - update to 6.4.0-150700.7.37.2
cluster-md-kmp-rt - update to 6.4.0-150700.7.37.2
ocfs2-kmp-rt - update to 6.4.0-150700.7.37.2
kernel-rt-devel - update to 6.4.0-150700.7.37.2
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.37.2
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
dlm-kmp-rt - update to 6.4.0-150700.7.37.2
kernel-64kb-debuginfo - update to 6.4.0-150700.53.37.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.37.1
kernel-64kb-devel - update to 6.4.0-150700.53.37.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.37.1
kernel-64kb - update to 6.4.0-150700.53.37.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.37.1
kernel-default-livepatch - update to 6.4.0-150700.53.37.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.37.1
kernel-default-extra - update to 6.4.0-150700.53.37.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.37.1
kernel-azure-devel - update to 6.4.0-150700.53.37.1
kernel-azure-debugsource - update to 6.4.0-150700.53.37.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.37.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.37.1
kernel-azure - update to 6.4.0-150700.53.37.1
reiserfs-kmp-default - update to 6.4.0-150700.53.37.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.37.1
kernel-obs-build - update to 6.4.0-150700.53.37.1
kernel-docs - update to 6.4.0-150700.53.37.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.37.1
kernel-zfcpdump - update to 6.4.0-150700.53.37.1
bpftool - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-tools - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
python3-perf-debuginfo - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
python3-perf - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
perf-debuginfo - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
perf - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-tools-devel - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-tools-debuginfo - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-source - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-headers - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-devel - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-debugsource - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-debuginfo - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
bpftool-debuginfo - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel - addressed in versions 6.6.0-144.0.0.139, 6.6.0-145.0.0.128, 6.6.0-145.0.0.141
kernel-extra-modules - update to 6.6.0-145.0.0.141
linux (Ubuntu package) - addressed in versions 5.15.0-175.185~20.04.1, 5.15.0-175.185, 5.15.0-176.186, 5.15.0-1088.96, 5.15.0-1100.101, 5.15.0-1101.107~20.04.1, 5.15.0-1102.108, 5.15.0-1105.112~20.04.1, 5.15.0-1105.112, 5.15.0-1105.114, 5.15.0.175.148, 5.15.0.176.161, 5.15.0.1088.87, 5.15.0.1100.100, 5.15.0.1101.100, 5.15.0.1102.98, 5.15.0.1105.101, 5.15.0.1105.108, 6.8.0-117.117, 6.8.0-117.117.1~22.04.1, 6.8.0-117.117.1, 6.8.0-1041.44, 6.8.0-1054.60, 6.8.0-1055.56~22.04.1, 6.8.0-1055.56, 6.8.0-1055.58+fips1, 6.8.0-1056.60, 6.8.0-1058.61, 6.8.0-1058.61+fips1, 6.8.0-2045.46, 6.8.1-1051.52~22.04.1, 6.8.1-1051.52
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-176.186~20.04.1
linux-fips (Ubuntu package) - addressed in versions 5.15.0-176.186+fips1, 5.15.0-1105.114+fips1, 5.15.0.176.102, 5.15.0.1105.95, 6.8.0-116.116+fips1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1046.46+1, 5.15.0-1057.57, 5.15.0.1046.48, 6.8.0-1024.24
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1057.57~20.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0-1070.74, 5.15.0.1070.73
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1097.99, 5.15.0-1104.113, 5.15.0.1097.101, 5.15.0.1104.108
linux-azure (Ubuntu package) - addressed in versions 5.15.0-1097.102, 5.15.0-1100.106~20.04.1, 5.15.0-1100.106, 5.15.0-1102.108~20.04.1, 5.15.0-1110.119, 5.15.0.1097.93, 5.15.0.1100.99, 5.15.0.1110.108, 6.8.0-1056.62
linux-ibm (Ubuntu package) - addressed in versions 5.15.0-1099.102~20.04.1, 5.15.0-1099.102, 5.15.0.1099.95
linux-raspi (Ubuntu package) - addressed in versions 5.15.0-1099.102, 5.15.0.1099.97
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0-1110.119+fips1, 5.15.0.1110.95
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1054.57, 6.8.0-1054.57.1
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1018.20~24.04.1, 6.17.0-1021.24~24.04.1
linux-oracle-6.17 (Ubuntu package) - addressed in versions 6.17.0-1019.19~24.04.3, 6.17.0-1019.19~24.04.3+1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1030.30
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31

External References

Related Security Bulletins