Memory leak in Linux kernel - CVE-2026-23137

Vulnerability identifier: #VU122862

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-2026-23137

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to memory leak within the attach_node_and_children() and unittest_data_add() functions in drivers/of/unittest.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
openEuler
Ubuntu
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
kernel-extra-modules
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)

Install update from vendor's repository.

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 - 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-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
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-extra-modules - update to 6.6.0-145.0.0.141
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

• https://git.kernel.org/stable/c/235a1eb8d2dcc49a6cf0a5ee1aa85544a5d0054b
• https://git.kernel.org/stable/c/f09b0f705bd7197863b90256ef533a6414d1db2c

• Memory leak in Linux kernel of driver
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 24.03 LTS SP2 update for kernel
• openEuler 24.03 LTS update for kernel
• Ubuntu update for linux-gcp-6.17
• Ubuntu update for linux-oem-6.17
• Ubuntu update for linux-azure-fde-6.17
• Ubuntu update for linux-azure-6.17
• Ubuntu update for linux-oracle-6.17