CVE-2025-55693 Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally

Description

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

Affected products and versions

Product	Affected versions	Fixed in
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.6899	10.0.26100.6899
Windows 11 Version 25H2 10.0	10.0.26200.0 → < 10.0.26200.6899	10.0.26200.6899
Windows 11 Version 24H2 10.0	10.0.26100.0 → < 10.0.26100.6899	10.0.26100.6899
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.6899	10.0.26100.6899

Other CVEs of Windows Server 2025 (Server Core installation)

The 3645 CVEs of Windows Server 2025 (Server Core installation) →

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-2026-108130 Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to… 7.8 High CVE-2026-108129 Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network 6.5 Medium