Resource exhaustion in Linux kernel - CVE-2026-43292

Vulnerability identifier: #VU130887

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-2026-43292

CWE-ID: CWE-400

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 improper resource management in kasan_release_vmalloc_node when freeing KASAN shadow pages during vmalloc cleanup. A local user can trigger processing of a large purge list to cause a denial of service.

The issue occurs when CONFIG_PAGE_OWNER is enabled, and processing many vmap_area entries without yielding can lead to prolonged RCU stalls and potential OOM conditions.

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

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - update to 6.6.0-145.3.14.145
bpftool - update to 6.6.0-145.3.14.145
bpftool-debuginfo - update to 6.6.0-145.3.14.145
kernel-debuginfo - update to 6.6.0-145.3.14.145
kernel-debugsource - update to 6.6.0-145.3.14.145
kernel-devel - update to 6.6.0-145.3.14.145
kernel-extra-modules - update to 6.6.0-145.3.14.145
kernel-headers - update to 6.6.0-145.3.14.145
kernel-source - update to 6.6.0-145.3.14.145
kernel-tools - update to 6.6.0-145.3.14.145
kernel-tools-debuginfo - update to 6.6.0-145.3.14.145
kernel-tools-devel - update to 6.6.0-145.3.14.145
perf - update to 6.6.0-145.3.14.145
perf-debuginfo - update to 6.6.0-145.3.14.145
python3-perf - update to 6.6.0-145.3.14.145
python3-perf-debuginfo - update to 6.6.0-145.3.14.145

• https://git.kernel.org/stable/c/1afe45f89d54b7183768ebbbbf14238ec187ab5c
• https://git.kernel.org/stable/c/2efa9c02c9b4c0d6866aa445f11056809b25ca28
• https://git.kernel.org/stable/c/5747435e0fd474c24530ef1a6822f47e7d264b27
• https://git.kernel.org/stable/c/b351fbe71091f7c8676c8ba597653d08b6719447

• Resource exhaustion in Linux kernel mm
• openEuler 24.03 LTS SP3 update for kernel