CVE-2026-88088 Integer overflow or wraparound in SQL Server allows an authorized attacker to elevate privileges locally

Description

Integer overflow or wraparound in SQL Server allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product	Affected versions	Fixed in
Microsoft SQL Server 2019 (GDR) 15.0	15.0.0 → < 15.0.2200.2	15.0.2200.2
Microsoft SQL Server 2019 for x64-based Systems (CU32) 15.0	15.0.4003.23 → < 15.0.4500.2	15.0.4500.2
Microsoft SQL Server 2022 (GDR) 16.0	16.0.0 → < 16.0.1210.3	16.0.1210.3
Microsoft SQL Server 2022 for x64-based Systems (CU27) 16.0	16.0.4003.1 → < 16.0.4305.5	16.0.4305.5
Microsoft SQL Server 2025 (CU8)	Versions not published
Microsoft SQL Server 2025 for x64-based Systems (CU9) 17.0	17.0.4006.2 → < 17.0.5015.4	17.0.5015.4
Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0	17.0.1050.2 → < 17.0.1145.4	17.0.1145.4

Other CVEs of Microsoft SQL Server 2019 (GDR)

The 222 CVEs of Microsoft SQL Server 2019 (GDR) →

CVE-2026-94512 Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network 8.8 High CVE-2026-94520 Use of externally-controlled format string in SQL Server allows an authorized attacker to deny service over a network 4.9 Medium CVE-2026-88085 Heap-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges locally 6.4 Medium CVE-2026-88086 Out-of-bounds read in SQL Server allows an unauthorized attacker to disclose information over an adjacent network 5.3 Medium