← All advisories

Unrated severityNVD Advisory· Published Jan 13, 2026· Updated Apr 1, 2026

Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

CVE-2026-20870

Description

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

Affected products

5

Microsoft/Windowsllm-fuzzy
Microsoft/Windows 11 24h2cpe-rescue
Range: 10.0.26100.0
Microsoft/Windows 11 25h2cpe-rescue
Range: 10.0.26200.0
Microsoft/Windows Server 2025cpe-rescue
Range: 10.0.26100.0
Microsoft/Windows Server 2025 (Server Core installation)v5
Range: 10.0.26100.0

Patches

Vulnerability mechanics

References

1

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20870mitrevendor-advisorypatch

News mentions

0

No linked articles in our index yet.