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Vulnerabilities CVE-2026-64562

CVE-2026-64562

High
Open
TLP:CLEAR

KVM: nVMX: Hide shadow VMCS right after VMCLEAR

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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.

Details

CVSS Score
8.8
EPSS Score
0.12%

2.2th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Confidence
90%
Published
Aug 4, 2026
Last Modified
Aug 8, 2026
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