CVE-2025-27739: Windows Kernel Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

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

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2025-Apr

Released

2025-04-08

EPSS Score

0.60% (percentile: 69.6%)

Description

Untrusted pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges locally.

FAQ

What privileges could an attacker gain? An authenticated attacker could elevate privileges to Secure Kernel. How could an attacker exploit this vulnerability? To exploit this vulnerability, an attacker would first have to log on to the system. The attacker could then run a specially crafted application to overwrite the page table data meant for the kernel.

Affected Products (21)

Windows

• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows Server 2022
• Windows Server 2022 (Server Core installation)
• Windows 10 Version 21H2 for 32-bit Systems
• Windows 10 Version 21H2 for ARM64-based Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows Server 2025 (Server Core installation)
• Windows 11 Version 23H2 for ARM64-based Systems
• Windows 11 Version 23H2 for x64-based Systems
• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows 11 Version 24H2 for ARM64-based Systems
• Windows 11 Version 24H2 for x64-based Systems
• Windows Server 2025

ESU

• Windows 11 Version 22H2 for ARM64-based Systems
• Windows 11 Version 22H2 for x64-based Systems
• Windows 10 Version 22H2 for x64-based Systems
• Windows 10 Version 22H2 for ARM64-based Systems
• Windows 10 Version 22H2 for 32-bit Systems

Security Updates (6)

• 5055519
• 5055526
• 5055518
• 5055528
• 5055523
• 5055527

Acknowledgments

Maxime Villard, of M.O.R.S.E.

Revision History

• 2025-04-08: Information published.