CVE-2026-77485 Use after free in SQL Server allows an authorized attacker to elevate privileges locally

Description

Use after free in SQL Server allows an authorized attacker to elevate privileges locally.

Affected products and versions

Product	Affected versions	Fixed in
Microsoft SQL Server 2017 (CU 31) 14.0	14.0.0 → < 14.0.3550.4	14.0.3550.4
Microsoft SQL Server 2017 (GDR) 14.0	14.0.0 → < 14.0.2130.4	14.0.2130.4
Microsoft SQL Server 2019 (CU 32) 15.0	15.0.0.0 → < 15.0.4490.9	15.0.4490.9
Microsoft SQL Server 2019 (GDR) 15.0	15.0.0 → < 15.0.2190.7	15.0.2190.7
Microsoft SQL Server 2022 (CU 26) 16.0	16.0.0.0 → < 16.0.4275.2	16.0.4275.2
Microsoft SQL Server 2022 (GDR) 16.0	16.0.0 → < 16.0.1200.5	16.0.1200.5
Microsoft SQL Server 2025 (CU8) 17.0	17.0.0.0 → < 17.0.4085.5	17.0.4085.5
Microsoft SQL Server 2025 for x64-based Systems (GDR) 17.0	17.0.1050.2 → < 17.0.1135.8	17.0.1135.8

Other CVEs of Microsoft SQL Server 2017 (CU 31)

The 150 CVEs of Microsoft SQL Server 2017 (CU 31) →

CVE-2026-67645 Out-of-bounds read in SQL Server allows an authorized attacker to disclose information over a network 6.5 Medium CVE-2026-77481 Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code over a network 8.8 High CVE-2026-66819 Improper neutralization of special elements used in an sql command ('sql injection') in SQL Server allows an… 8.8 High CVE-2026-78442 Heap-based buffer overflow in Windows OLE DB allows an unauthorized attacker to execute code over a network 8.8 High