Medium [CVE-2026-67641] Microsoft SQL Server Denial of Service Vulnerability
This medium-severity Microsoft Server advisory covers CVE-2026-67641 affecting Microsoft SQL Server 2022 (CU 26), Microsoft SQL Server 2022 (GDR), Microsoft SQL Server 2025 (CU8).
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Summary
Integer overflow or wraparound in SQL Server allows an authorized attacker to deny service over a network.
Affected products named by the advisory: Microsoft SQL Server 2022 (CU 26); Microsoft SQL Server 2022 (GDR); Microsoft SQL Server 2025 (CU8); Microsoft SQL Server 2025 for x64-based Systems (GDR).
- Microsoft SQL Server 2022 (CU 26) 16.0.0.0 before 16.0.4275.2
- Microsoft SQL Server 2022 (GDR) 16.0.0 before 16.0.1200.5
- Microsoft SQL Server 2025 (CU8) 17.0.0.0 before 17.0.4085.5
- Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0.1050.2 before 17.0.1135.8
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 16.0.4275.2
- 16.0.1200.5
- 17.0.4085.5
- 17.0.1135.8
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 16.0.4275.2, 16.0.1200.5, 17.0.4085.5, 17.0.1135.8. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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