CVE-2026-20863

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

Score

CVSS 3.1 7.0 High

Status

Analyzed - secure@microsoft.com

Published

2026-01-13

Last modified

2026-07-30

Weaknesses

CWE-415

Affected products

• Windows 11 23H2 (Microsoft)
• Windows 11 23h2 (Microsoft)
• Windows 11 24H2 (Microsoft)
• Windows 11 24h2 (Microsoft)
• Windows 11 25H2 (Microsoft)
• Windows 11 25h2 (Microsoft)
• Windows Server 2022 (Microsoft)
• Windows Server 2022 23h2 (Microsoft)
• Windows Server 2025 (Microsoft)
• Windows Server 23h2 (Microsoft)

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20863