CVE-2026-70243 Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally

Description

Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product	Affected versions	Fixed in
Windows 11 Version 23H2 10.0	10.0.22631.0 → < 10.0.22631.7652	10.0.22631.7652
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.33650	10.0.26100.33650
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.33650	10.0.26100.33650

Other CVEs of Windows 11 Version 23H2

The 3424 CVEs of Windows 11 Version 23H2 →

CVE-2026-105016 Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network 9.8 Critical 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-2026-108129 Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network 6.5 Medium