---
id: CVE-2026-68081
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest
  state


  Put all vmcs12 pages if KVM synthesizes a nested VM-Exit due to invalid

  guest while emu…
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest
  state


  Put all vmcs12 pages if KVM synthesizes a nested VM-Exit due to invalid

  guest while emu…
severity: none
published: '2026-08-08'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-68081'
references:
  - url: 'https://git.kernel.org/stable/c/2c87a087c20632d68920272173b5d7c47f9bcf70'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2f2312c422fd2695da772cecb30c69994b795964'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7996013b85687034d2e820cef94d6404192e3a3d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.09514
ingestedAt: '2026-08-09T04:32:45.242Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state

Put all vmcs12 pages if KVM synthesizes a nested VM-Exit due to invalid
guest while emulating VMLAUNCH or VMRESUME.  The invalid guest state path
doesn't use nested_vmx_vmexit() as that API is intended to be used if and
only if L2 is active, and the open coded equivalent neglects to put the
vmcs12 pages.  Failure to put the vmcs12 pages leaks any pinned pages
(and/or mappings) if L1 retries VMLAUNCH/VMRESUME.

Note, the !from_vmenter scenario doesn't suffer the same problem, as
vmx_get_nested_state_pages() only gets/pins/maps the vmcs12 pages if L2 is
active, i.e. if a "full" VM-Exit is guaranteed before KVM will retry
getting vmcs12 pages.

## Remediation

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