CVE-2026-67376: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft SQL Server 2017 (CU 31)
Description
CVE-2026-67376 is an integer overflow or wraparound vulnerability in Microsoft SQL Server 2017 (CU 31) that allows an unauthorized attacker to cause a denial of service over a network. The vulnerability has a high severity score of 7.5 and affects multiple versions of Microsoft SQL Server 2017 and later. An official fix is available from Microsoft.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Microsoft SQL Server 2017 (CU 31)
Microsoft
Microsoft SQL Server 2017 (GDR)
Microsoft
Microsoft SQL Server 2019 (CU 32)
Microsoft
Microsoft SQL Server 2019 (GDR)
Microsoft
Microsoft SQL Server 2022 (CU 26)
Microsoft
Microsoft SQL Server 2022 (GDR)
Microsoft
Microsoft SQL Server 2025 (CU8)
Microsoft
Microsoft SQL Server 2025 for x64-based Systems (GDR)
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-67376 and classified under CWE-190 (Integer Overflow or Wraparound), affects Microsoft SQL Server 2017 (CU 31) and later versions. It allows an unauthorized attacker to trigger an integer overflow or wraparound condition, resulting in denial of service (DoS) over the network. The CVSS v3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker can exploit this vulnerability remotely without authentication or user interaction to cause a denial of service condition, impacting the availability of the affected SQL Server instances. There is no confidentiality or integrity impact reported.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67376 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-29T14:57:03.841Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67376","vendor":"Microsoft"}]
Threat ID: 6aa044c9acd9273b49fa7b3a
Added to database: 09/08/2026, 17:24:25 UTC
Last enriched: 10/16/2026, 20:50:31 UTC
Last updated: 10/21/2026, 13:40:30 UTC
Views: 26
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