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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.0 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d
https://git.kernel.org/stable/c/4f50e6aec16f69627dbad5704d1e90a255d766a7
https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946
https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3
https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3
https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412
https://git.kernel.org/stable/c/b82c3144d8264265448292ca406f60bafeba3b6f
https://git.kernel.org/stable/c/dc3eecfa219ebc9d01eaf7d1abd1441efe884dab

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-04 07:16

Updated : 2026-08-19 17:20

NVD link : CVE-2026-64562

Mitre link : CVE-2026-64562

CVE.ORG link : CVE-2026-64562

JSON object : View

Products Affected

No product.

CWE

No CWE.

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But\nbecause it is asynchronous with respect to loaded_vmcs_clear(), the vCPU\nmight migrate before the pointer is cleared and __loaded_vmcs_clear()\nmay then execute VMCLEAR.\n\nThe VMCS needs to stay attached until its explicit VMCLEAR completes, but\nthen it can be hidden and the page safely freed."}], "lastModified": "2026-08-19T17:20:15.970", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}