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 3.1

8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-08-04

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• 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

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