---
id: CVE-2026-64562
title: |-
  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
summary: |-
  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 loa…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
published: '2026-08-04'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64562'
references:
  - url: 'https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00176
epssPercentile: 0.06247
ingestedAt: '2026-08-08T19:28:34.990Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.