win32k use after free

About this tag
The win32k use after free tag covers a specific class of Windows kernel vulnerability where the Win32K graphics subsystem improperly handles memory after it has been freed, leading to a use-after-free condition. Content under this tag focuses on Microsoft security bulletins such as CVE-2026-34347, an Important-rated elevation-of-privilege flaw that allows a local, authenticated attacker to gain SYSTEM privileges by winning a race condition. Discussions emphasize the importance of patching these vulnerabilities even though they require local access, as they are commonly used in multi-stage attacks to escalate from an initial foothold to full system control. The tag is relevant for IT administrators and security professionals tracking Windows kernel patches.
  1. CVE-2026-34347 Patch Now: Win32k Use-After-Free Win SYSTEM Privilege

    Microsoft disclosed CVE-2026-34347 on May 12, 2026, as an Important-rated Windows Win32k elevation-of-privilege vulnerability in which a local, authenticated attacker could exploit a use-after-free flaw in the Win32K graphics subsystem to gain SYSTEM privileges after winning a race condition...