CVE-2026-67633: Microsoft SQL Server Denial of Service Vulnerability
Overview
- Severity
- Medium (CVSS 6.5)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Category
- Denial of Service
- Exploit Status
- Not Exploited
- Exploitation Likelihood
- Unlikely
- Patch Tuesday
- 2026-Sep
- Released
- 2026-09-08
Description
Out-of-bounds read in SQL Server allows an authorized attacker to deny service over a network.
Affected Products (8)
SQL Server
- Microsoft SQL Server 2017 for x64-based Systems (GDR)
- Microsoft SQL Server 2019 for x64-based Systems (GDR)
- Microsoft SQL Server 2017 for x64-based Systems (CU 31)
- Microsoft SQL Server 2022 for x64-based Systems (GDR)
- Microsoft SQL Server 2025 for x64-based Systems (GDR)
- Microsoft SQL Server 2019 for x64-based Systems (CU 32)
- Microsoft SQL Server 2025 for x64-based Systems (CU8)
- Microsoft SQL Server 2022 for x64-based Systems (CU 26)
Security Updates (8)
Acknowledgments
Microsoft Red Team
Revision History
- 2026-09-08: Information published.