Untrusted Pointer Dereference in Windows Secure Kernel Mode

Publication date: 2026-09-08

Last updated on: 2026-09-10

Assigner: Microsoft Corporation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-10

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-83939

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_11_26h1	to 10.0.28000.2954 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2954 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-822	The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is an untrusted pointer dereference flaw in Windows Secure Kernel Mode. It allows an authorized attacker with local access to elevate their privileges by exploiting improper handling of pointers in the kernel.

Impact Analysis

An attacker could gain elevated privileges on your system, allowing them to perform unauthorized actions such as installing malware, accessing sensitive data, or taking control of your device.

Mitigation Strategies

Apply the latest security updates from Microsoft immediately to patch the Windows Secure Kernel Mode vulnerability. Monitor Microsoft's security advisories for patches and ensure all systems are updated promptly.

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