SB20260507139 - Race condition in Linux kernel x86 kvm

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Main Vulnerability Database SB20260507139

SB20260507139 - Race condition in Linux kernel x86 kvm

Published: May 7, 2026

Security Bulletin ID SB20260507139
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-43214)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to improper synchronization in __get_sregs2() when reading PDPTR registers during ioctl handling. A local user can issue a crafted ioctl request to cause a denial of service.

The issue is triggered when reading PDPTRs causes access to guest memory through memslot lookups without the required SRCU read-side protection.


Remediation

Install update from vendor's website.

References