CVE intelligence

CVE-2026-64562

Vulnerability intelligence

Published Aug 4, 2026Sources checked Oct 28, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-64562 and is rated High severity with a CVSS score of 8.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Aug 9, 2026

CBL-Mariner Releases

Vendor-listed releases

6.6.150.1-1

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-64562?

In the Linux kernel, the following vulnerability has been resolved:

KVM: nVMX: Hide shadow VMCS right after VMCLEAR

free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR.

The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.

Source: NVD