CVE-2026-70243

Published: Oct 13, 2026Modified: Oct 22, 2026

7.0

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.0 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

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

Affected (3)

Products: Microsoft: Windows 11 23h2, Windows Server 2025

2 products

Windows 11 23h2

Windows Server 2025

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	version < 10.0.22631.7652
Microsoft Windows 11 23h2	version < 10.0.22631.7652
Microsoft Windows Server 2025	version < 10.0.26100.33650

Related CWEs

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70243

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

No history available yet.