SB2026052883 - Improper control of a resource through its lifetime in Linux kernel kvm svm

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Main Vulnerability Database SB2026052883

SB2026052883 - Improper control of a resource through its lifetime in Linux kernel kvm svm

Published: May 28, 2026

Security Bulletin ID SB2026052883
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-2026-45987)

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 synchronization in nested SVM interrupt shadow handling when restoring nested virtual machine state. A local user can trigger restoration of nested state with KVM_SET_VCPU_EVENTS preceding KVM_SET_NESTED_STATE to cause a denial of service.

The issue affects L2 guests, where an incorrectly restored interrupt shadow can cause the vCPU to hang.


Remediation

Install update from vendor's website.

References