CVE-2026-88082 Heap-based buffer overflow in SQL Server allows an authorized attacker to elevate privileges locally

Description

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