CVE-2026-20838

MEDIUM

Windows Kernel - Information Disclosure via Error Message

Title source: llm
STIX 2.1

Description

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

References (1)

Core 1
Core References

Scores

CVSS v3 5.5
EPSS 0.0063
EPSS Percentile 45.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-209
Status published
Products (14)
Microsoft/Windows 11 version 22H3 10.0.22631.0 - 10.0.22631.6491
Microsoft/Windows 11 Version 23H2 10.0.22631.0 - 10.0.22631.6491
Microsoft/Windows 11 Version 24H2 10.0.26100.0 - 10.0.26100.7623
Microsoft/Windows 11 Version 25H2 10.0.26200.0 - 10.0.26200.7623
Microsoft/Windows Server 2022 10.0.20348.0 - 10.0.20348.4648
Microsoft/Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 - 10.0.25398.2092
Microsoft/Windows Server 2025 10.0.26100.0 - 10.0.26100.32230
Microsoft/Windows Server 2025 (Server Core installation) 10.0.26100.0 - 10.0.26100.32230
microsoft/windows_11_23h2 < 10.0.22631.6491
microsoft/windows_11_24h2 < 10.0.26100.7623
... and 4 more
Published Jan 13, 2026
Tracked Since Feb 18, 2026