---
id: CVE-2026-69978
title: >-
  Null pointer dereference in Windows VMSwitch allows an authorized attacker to
  deny service locally.
summary: >-
  Null pointer dereference in Windows VMSwitch allows an authorized attacker to
  deny service locally.
severity: medium
cvss: 5.6
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H'
cwe:
  - CWE-476
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T22:17:53.590'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-69978'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69978'
    label: secure@microsoft.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:28.976Z'
---

## Overview

Null pointer dereference in Windows VMSwitch allows an authorized attacker to deny service locally.

## Remediation

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