CVE-2026-85921 Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally

Description

Double free in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product	Affected versions	Fixed in
Windows 11 version 26H1 10.0	10.0.28000.0 → < 10.0.28000.2956	10.0.28000.2956

Other CVEs of Windows 11 version 26H1

The 2573 CVEs of Windows 11 version 26H1 →

CVE-2026-108463 Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security… 8.8 High CVE-2026-108136 Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally 7.8 High CVE-2026-108135 Improper link resolution before file access ('link following') in Windows Backup Engine allows an authorized attacker to… 7.0 High CVE-2026-105016 Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network 9.8 Critical