SB2026071104 - Improper Check or Handling of Exceptional Conditions in Linux kernel kvm

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Main Vulnerability Database SB2026071104

SB2026071104 - Improper Check or Handling of Exceptional Conditions in Linux kernel kvm

Published: July 11, 2026

Security Bulletin ID SB2026071104
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) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-53345)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

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 handling of a warning condition in KVM memory dirty page tracking in virt/kvm/kvm_main.c when destroying a vCPU after certain SEV-ES VM-Exits without a subsequent KVM_RUN. A local user can trigger this condition to cause a denial of service.

The issue occurs in SEV-ES guest scenarios where KVM retains a writable mapping of a guest page across an exit to userspace.


Remediation

Install update from vendor's website.

References