CVE-2026-70243: Windows 11 version 23H2 10.0.22631.0 to before 10.0.22631.7652; +2 more affected products

Affected technology

Windows 11 version 23H2 · 10.0.22631.0 to before 10.0.22631.7652
Microsoft

Windows Server 2025 · 10.0.26100.0 to before 10.0.26100.33650
Microsoft

Windows Server 2025 (Server Core installation) · 10.0.26100.0 to before 10.0.26100.33650
Microsoft

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

The source says use after free in Windows Kernel allows an authorized attacker to elevate privileges locally. Vendor/CNA’s CVSS 3.1 assessment (base score 7.0/10) rates confidentiality, integrity and availability impact as high.