SB2026091731 - Improper Check or Handling of Exceptional Conditions in Linux kernel kvm vmx

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Main Vulnerability Database SB2026091731

SB2026091731 - Improper Check or Handling of Exceptional Conditions in Linux kernel kvm vmx

Published: September 17, 2026

Security Bulletin ID SB2026091731
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

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-2026-89930)

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

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause stale TLB translations to be used.

The vulnerability exists due to failure to service queued local TLB flush requests in KVM nVMX nested VM-entry handling when a nested VM entry fails after switching to the L2 context. A remote attacker can change L2's VPID and trigger a failed nested VM entry to cause stale TLB translations to be used.


Remediation

Install update from vendor's website.

References