SB2026051458 - Improper control of a resource through its lifetime in Linux kernel kvm svm

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Main Vulnerability Database SB2026051458

SB2026051458 - Improper control of a resource through its lifetime in Linux kernel kvm svm

Published: May 14, 2026

Security Bulletin ID SB2026051458
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-43483)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 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/E:U/U:Clear


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

The vulnerability exists due to improper state management in the KVM SVM AVIC/CR8 interception logic when activating or deactivating AVIC. A local user can trigger guest operations that lead to a dangling CR8 write intercept to cause a denial of service.

The issue affects SVM and can be fatal to Windows guests when combined with a TPR synchronization bug.


Remediation

Install update from vendor's website.

References