Use After Free in Windows DNS Elevates Privileges

Publication date: 2026-09-08

Last updated on: 2026-09-24

Assigner: Microsoft Corporation

Description

Use after free in Windows DNS allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-24

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-69310

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_dns	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use after free issue in Windows DNS that allows an authorized attacker to elevate privileges locally. Use after free refers to a memory corruption flaw where an application continues to use memory after it has been freed, potentially leading to arbitrary code execution.

Impact Analysis

An attacker with local access could exploit this to gain higher privileges on your system, potentially allowing them to install programs, view or delete data, or create new accounts with full user rights.

Mitigation Strategies

Apply the latest security updates from Microsoft for Windows DNS to patch the use-after-free vulnerability. Monitor Microsoft's security advisories for patches and install them promptly.

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