SB2026040319 - Improper control of a resource through its lifetime in Linux kernel mm
Published: April 3, 2026
Security Bulletin ID
SB2026040319
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 security vulnerability.
1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-23416)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper state update in mm/mseal VMA iteration logic when modifying and merging virtual memory areas. A local user can trigger VMA merges during memory sealing operations to cause a denial of service.
The issue occurs because the stored end of the current VMA can become stale after vma_modify_flags() merges a VMA, leading to an incorrect start value on the next iteration.
Remediation
Install update from vendor's website.