Main Vulnerability Database Vulnerabilities #VU126143

Double free in Microsoft Windows and Windows Server - CVE-2026-26179

Published: April 15, 2026

Vulnerability identifier: #VU126143

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-26179

CWE-ID: CWE-415

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the target system.

The vulnerability exists due to a boundary error in Windows Kernel. A local user can pass specially crafted data to the application, trigger double free error and gain elevated privileges on the system.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-26179

Install updates from vendor's website.

Microsoft Windows - addressed in versions 11 23H2 10.0.22631.6936, 11 24H2 10.0.26100.32690, 11 25H2 10.0.26200.8246, 11 26H1 10.0.28000.1836
Windows Server - addressed in versions 2012 R2 6.3.9600.23132, 2022 23H2 10.0.25398.2274, 2025 10.0.26100.32690

External References

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

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