Out-of-Bounds Read in SQL Server

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: Microsoft Corporation

Description

Out-of-bounds read in SQL Server allows an authorized attacker to deny service over a network.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-09-08

Generated

2026-09-09

AI Q&A

2026-09-09

EPSS Evaluated

N/A

NVD

CVE-2026-67633

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	sql_server	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-125	The product reads data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

Executive Summary

This is an out-of-bounds read vulnerability in Microsoft SQL Server. An authorized attacker can exploit it to cause a denial of service over a network by reading memory outside the intended buffer.

Impact Analysis

The impact includes service disruption as the vulnerability allows an attacker to crash SQL Server remotely. This could lead to downtime for databases relying on the affected software.

Mitigation Strategies

Apply the latest security updates from Microsoft for SQL Server to patch the out-of-bounds read vulnerability. Monitor Microsoft's security advisories for updates and ensure network-level protections like firewalls are properly configured to limit unauthorized access.

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