PT-2026-40148

CVE-2026-33841

Published

2026-05-12

Updated

2026-06-17

Description by

CVSS 3.1

7.8

High

MetricsAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Windows versions prior to Server 2025

Description A heap-based buffer overflow in the Windows Kernel allows an authorized local attacker to elevate their privileges. A buffer overflow occurs when a program writes more data to a memory block (the buffer) than it is allocated to hold, potentially overwriting adjacent memory.

Recommendations Update to a version released after the May 2026 patch cycle.

Exploitability

Fix

Impacts

Researchers

Vendors

Affected products

Weakness enumeration