CVE-2026-26179

Published: Apr 14, 2026Modified: Apr 23, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

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

Affected (10)

Products: Microsoft: Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2022 23h2, Windows Server 2025

6 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2022 23h2

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	Before 10.0.22631.6936
Microsoft Windows 11 23h2	Before 10.0.22631.6936
Microsoft Windows 11 24h2	Before 10.0.26100.8246
Microsoft Windows 11 24h2	Before 10.0.26100.8246
Microsoft Windows 11 25h2	Before 10.0.26200.8246
Microsoft Windows 11 25h2	Before 10.0.26200.8246
Microsoft Windows 11 26h1	Before 10.0.28000.1836
Microsoft Windows 11 26h1	Before 10.0.28000.1836
Microsoft Windows Server 2022 23h2	Before 10.0.25398.2274
Microsoft Windows Server 2025	Before 10.0.26100.32690

Related CWEs

The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26179

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.