Review reviewHigh

CVE-2026-20863

Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2

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

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7

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

Product: Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2
Affected versions: >= 10.0.22631.0 < 10.0.22631.6491, >= 10.0.26100.0 < 10.0.26100.7623, >= 10.0.26200.0 < 10.0.26200.7623, >= 10.0.20348.0 < 10.0.20348.4648, >= 10.0.25398.0 < 10.0.25398.2092, >= 10.0.26100.0 < 10.0.26100.32230, < 10.0.22631.6491, < 10.0.26100.7623, < 10.0.26200.7623, < 10.0.20348.4648, < 10.0.25398.2092, < 10.0.26100.32230
Fixed versions: 10.0.22631.6491, 10.0.26100.7623, 10.0.26200.7623, 10.0.20348.4648, 10.0.25398.2092, 10.0.26100.32230

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft Windows 11 version 23H2, Windows 11 Version 23H2, Windows 11 Version 24H2 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.