CVE-2026-20838 MEDIUM

CVE-2026-20838: Windows Kernel Information Disclosure Vulnerability

Vendor Microsoft
Product Windows 11 version 22H3
Weakness CWE-209 · Error message info leak
Published January 13, 2026
Last update April 1, 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 High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Generation of error message containing sensitive information in Windows Kernel allows an authorized attacker to disclose information locally.

Key dates

02Disclosure timeline

January 13, 2026 CVE published
April 1, 2026 Record updated