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CVE-2026-64562

8.8 · HIGH

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.

Published Aug 4, 2026EPSS 0.13%

Overview

CVE-2026-64562 is a high-severity vulnerability. It was published on August 4, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695dRefgit.kernel.org/stable/c/4f50e6aec16f69627dbad5704d1e90a255d766a7Refgit.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946Refgit.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3Refgit.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3Refgit.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412Refgit.kernel.org/stable/c/b82c3144d8264265448292ca406f60bafeba3b6fRefgit.kernel.org/stable/c/dc3eecfa219ebc9d01eaf7d1abd1441efe884dab

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64562?

CVE-2026-64562 is a high-severity vulnerability. It was published on August 4, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-64562?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-64562?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64562?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64562 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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