CVE-2026-67641: CWE-190: Integer Overflow or Wraparound in Microsoft Microsoft SQL Server 2022 (CU 26)
Description
CVE-2026-67641 is an integer overflow or wraparound vulnerability in Microsoft SQL Server 2022 (CU 26) that allows an authorized attacker to cause a denial of service over a network. The vulnerability affects specific versions prior to certain build numbers in both 16.x and 17.x branches. The issue has a medium severity rating with a CVSS score of 6.5. An official fix is available from Microsoft.
CVSS v3.1
Score 6.5medium
Affected software
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)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound condition in Microsoft SQL Server 2022 (CU 26). Exploitation requires an attacker with authorized access and can result in denial of service (DoS) over the network. The vulnerability does not impact confidentiality or integrity but affects availability. The affected versions include multiple build ranges in the 16.0 and 17.0 version branches. Microsoft has released an official fix to address this issue.
Potential Impact
An authorized attacker can exploit this integer overflow vulnerability to cause a denial of service condition on the affected SQL Server instances. There is no impact on confidentiality or integrity, but availability is affected, potentially disrupting database services.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the security updates provided in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67641 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-29T22:49:19.796Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67641","vendor":"Microsoft"}]
Threat ID: 6aa044cdacd9273b49fa7baa
Added to database: 09/08/2026, 17:24:29 UTC
Last enriched: 10/16/2026, 20:52:10 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 26
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