CVE-2010-2549: Microsoft Windows Server 2008

High severity, CVSS 7.2. EPSS: 5.1% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the kernel-mode drivers in Microsoft Windows Vista SP1 and SP2 and Server 2008 Gold and SP2 allows local users to gain privileges or cause a denial of service (system crash) by using a large number of calls to the NtUserCheckAccessForIntegrityLevel function to trigger a failure in the LockProcessByClientId function, leading to deletion of an in-use process object, aka "Win32k Reference Count Vulnerability."

Affected products

• Microsoft Windows Server 2008: any version; affected versions not specified
• Microsoft Windows Vista: any version

Published 2010-07-02. Last modified 2026-06-16.