CVE-2026-42915 MEDIUM

CVE-2026-42915: Microsoft Windows VMSwitch Denial of Service Vulnerability

Vendor Microsoft
Product Windows 10 Version 21H2
Weakness CWE-131
Published June 9, 2026
Last update July 8, 2026
View on NVD All CVEs

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

What the vulnerability does

01Description

Incorrect calculation of buffer size in Windows VMSwitch allows an authorized attacker to deny service locally.

Key dates

02Disclosure timeline

June 9, 2026 CVE published
July 8, 2026 Record updated