CVE-2026-67385

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Use After Free in Microsoft SQL Server

Publication date: 2026-09-08

Last updated on: 2026-09-09

Assigner: Microsoft Corporation

Description

Use after free in SQL Server allows an authorized attacker to execute code over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-09

Generated

2026-09-29

AI Q&A

2026-09-09

EPSS Evaluated

2026-09-27

NVD

CVE-2026-67385

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sql_server	*

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 is a use-after-free vulnerability in Microsoft SQL Server. It allows an authorized attacker to execute arbitrary code remotely over a network by exploiting a memory corruption issue where a program continues to use memory after it has been freed.

Impact Analysis

An attacker could exploit this to run malicious code on your SQL Server, potentially leading to data theft, unauthorized access, or system compromise. This requires the attacker to have valid credentials but could allow full control of the server.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Apply the latest security updates from Microsoft for SQL Server as soon as possible to patch the use-after-free vulnerability.

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