Improper locking in Linux kernel - CVE-2026-23097

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Main Vulnerability Database Vulnerabilities #VU122357

Improper locking in Linux kernel - CVE-2026-23097

Published: February 5, 2026


Vulnerability identifier: #VU122357
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-2026-23097
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the unmap_and_move_huge_page() function in mm/migrate.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
Red Hat CodeReady Linux Builder for ARM 64
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Ubuntu
openEuler
IBM Qradar SIEM
Juniper Secure Analytics (JSA)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel (Red Hat package)
python3-perf
kernel-doc
kernel-abi-stablelists
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-debug-modules-extra
kernel-devel
kernel
kernel-core
bpftool
kernel-cross-headers
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
python3-perf-debuginfo
perf-debuginfo
kernel-debugsource
kernel-tools-devel
kernel-tools-debuginfo
kernel-source
kernel-debuginfo
bpftool-debuginfo
kernel-rt (Red Hat package)
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-azure (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-ibm (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux (Debian package)
kernel-extra-modules
linux-nvidia (Ubuntu package)
linux-nvidia-6.8 (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-2026-23097

Install update from vendor's repository.

IBM Qradar SIEM - update to 7.5.0 Update Pack 15 IF01
Juniper Secure Analytics (JSA) - update to 7.5.0 UP15 IF01
kernel (Red Hat package) - addressed in versions 4.18.0-305.194.1.el8_4, 4.18.0-372.190.1.el8_6, 4.18.0-477.139.1.el8_8, 4.18.0-553.109.1.el8_10, 5.14.0-70.178.1.el9_0, 5.14.0-284.169.1.el9_2, 5.14.0-570.110.1.el9_6, 5.14.0-611.36.1.el9_7, 6.12.0-55.72.1.el10_0
python3-perf - update to 4.18.0-553.109.1.0.1
kernel-doc - update to 4.18.0-553.109.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.109.1.0.1
perf - update to 4.18.0-553.109.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.109.1.0.1
kernel-tools-libs - update to 4.18.0-553.109.1.0.1
kernel-tools - update to 4.18.0-553.109.1.0.1
kernel-modules-extra - update to 4.18.0-553.109.1.0.1
kernel-modules - update to 4.18.0-553.109.1.0.1
kernel-headers - update to 4.18.0-553.109.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.109.1.0.1
kernel-devel - update to 4.18.0-553.109.1.0.1
kernel - update to 4.18.0-553.109.1.0.1
kernel-core - update to 4.18.0-553.109.1.0.1
bpftool - update to 4.18.0-553.109.1.0.1
kernel-cross-headers - update to 4.18.0-553.109.1.0.1
kernel-debug - update to 4.18.0-553.109.1.0.1
kernel-debug-core - update to 4.18.0-553.109.1.0.1
kernel-debug-devel - update to 4.18.0-553.109.1.0.1
kernel-debug-modules - update to 4.18.0-553.109.1.0.1
python3-perf-debuginfo - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
python3-perf - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
perf-debuginfo - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
perf - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-debugsource - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools-devel - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools-debuginfo - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-source - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-headers - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-devel - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-debuginfo - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
bpftool-debuginfo - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
bpftool - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel - addressed in versions 5.10.0-303.0.0.206, 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-rt (Red Hat package) - addressed in versions 5.14.0-70.178.1.rt21.250.el9_0, 5.14.0-284.169.1.rt14.454.el9_2
linux (Ubuntu package) - addressed in versions 5.15.0.175.148, 5.15.0-175.185, 5.15.0-175.185~20.04.1, 5.15.0.176.161, 5.15.0-176.186, 5.15.0.1088.87, 5.15.0-1088.96, 5.15.0.1100.100, 5.15.0-1100.101, 5.15.0.1101.100, 5.15.0-1101.107~20.04.1, 5.15.0.1102.98, 5.15.0-1102.108, 5.15.0.1105.101, 5.15.0.1105.108, 5.15.0-1105.112, 5.15.0-1105.112~20.04.1, 5.15.0-1105.114, 6.8.0-117.117, 6.8.0-117.117.1, 6.8.0-117.117.1~22.04.1, 6.8.0-1041.44, 6.8.0-1054.60, 6.8.0-1055.56, 6.8.0-1055.56~22.04.1, 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, 6.8.1-1051.52~22.04.1
linux-fips (Ubuntu package) - addressed in versions 5.15.0.176.102, 5.15.0-176.186+fips1, 5.15.0.1105.95, 5.15.0-1105.114+fips1, 6.8.0-116.116+fips1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-176.186~20.04.1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1046.46+1, 5.15.0.1046.48, 5.15.0-1057.57, 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 5.15.0.1070.73, 5.15.0-1070.74
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1097.93, 5.15.0-1097.102, 5.15.0.1100.99, 5.15.0-1100.106, 5.15.0-1100.106~20.04.1, 5.15.0-1102.108~20.04.1, 5.15.0.1110.108, 5.15.0-1110.119, 6.8.0-1056.62
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1097.99, 5.15.0.1097.101, 5.15.0.1104.108, 5.15.0-1104.113
linux-ibm (Ubuntu package) - addressed in versions 5.15.0.1099.95, 5.15.0-1099.102, 5.15.0-1099.102~20.04.1
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1099.97, 5.15.0-1099.102
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1110.95, 5.15.0-1110.119+fips1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
linux (Debian package) - addressed in versions 6.1.162-1, 6.12.69-1
kernel-extra-modules - update to 6.6.0-142.0.0.137
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1054.57, 6.8.0-1054.57.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
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