Integer overflow in Linux kernel - CVE-2026-43323

Vulnerability identifier: #VU130867

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-2026-43323

CWE-ID: CWE-190

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to an integer overflow in the CFS scheduler when handling repeated yield operations across runnable tasks. A local user can trigger repeated yield activity to cause a denial of service.

Systems with multiple cgroups may be more exposed because scheduler tick updates may not reach every cgroup in a timely manner.

Linux kernel
openEuler
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
bpftool
kernel
kernel-extra-modules

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
python3-perf - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
perf-debuginfo - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
perf - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-tools-devel - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-tools-debuginfo - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-tools - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-source - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-headers - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-devel - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-debugsource - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-debuginfo - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
bpftool-debuginfo - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
bpftool - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel - addressed in versions 6.6.0-145.1.17.155, 6.6.0-145.3.17.150
kernel-extra-modules - update to 6.6.0-145.3.17.150

• https://git.kernel.org/stable/c/1319ea57529e131822bab56bf417c8edc2db9ae8
• https://git.kernel.org/stable/c/87573883c30f1a8555ff720836bb6ea231058539
• https://git.kernel.org/stable/c/c089147074ed96ff4330739a0559394c19a3dfc8
• https://git.kernel.org/stable/c/fb61ffb3fb30a161eb5404c27fc7635e275beafd

• Integer overflow in Linux kernel sched
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel