SB20260812445 - Improper control of a resource through its lifetime in Linux kernel kvm svm

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Main Vulnerability Database SB20260812445

SB20260812445 - Improper control of a resource through its lifetime in Linux kernel kvm svm

Published: August 12, 2026

Security Bulletin ID SB20260812445
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-2026-68093)

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

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper resource lifecycle management in KVM SVM ASID handling when resuming a vCPU after a CPU hotplug cycle. A local user can trigger CPU hotplug conditions and resume execution of a affected vCPU to cause a denial of service.

The issue can result in ASID collisions between vCPUs from different VMs, causing stale TLB translations and KVM internal emulation failures.


Remediation

Install update from vendor's website.

References