SB20260925147 - Improper initialization in Linux kernel mm
Published: September 25, 2026
Security Bulletin ID
SB20260925147
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper initialization (CVE-ID: CVE-2026-93232)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.