Use-after-free in Microsoft SQL Server - CVE-2026-77485
Published: September 9, 2026
Vulnerability identifier: #VU148417
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-77485
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to elevate privileges.
The vulnerability exists due to use-after-free in SQL Server when attempting to win a race condition. A local user can exploit the race condition to elevate privileges.
Successful exploitation could grant SYSTEM privileges.
Affected software
Microsoft SQL Server
How to mitigate CVE-2026-77485
Install security update from vendor's website.
Microsoft SQL Server - addressed in versions 14.0.2130.4, 14.0.3550.4, 15.0.2190.7, 15.0.4490.9, 16.0.1200.5, 16.0.4275.2, 17.0.1135.8, 17.0.4085.5