CVE-2026-20863

HIGH

Microsoft Windows Win32K - Double Free in ICOMP

Title source: llm
STIX 2.1

Description

Double free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.

References (1)

Scores

CVSS v3 7.0
EPSS 0.0003
EPSS Percentile 9.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-415
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