Improper initialization in Linux kernel - CVE-2026-93232
Published: September 25, 2026
Vulnerability identifier: #VU152171
CSH Severity: Low
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93232
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a denial of service.
The vulnerability exists due to improper initialization in the zone->vmemmap_tails[] shared tail pages when processing bootmem HugeTLB folios before the shared tail pages are initialized. A local privileged user can boot a kernel with hugetlb_free_vmemmap enabled to cause a denial of service.
The issue affects kernels built with CONFIG_DEBUG_VM.
Affected software
Linux kernel
How to mitigate CVE-2026-93232
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3