Microsoft Security Response Center

Protection mechanism failure in Windows GDI allows an unauthorized attacker to disclose information over a network.

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Buffer over-read in Virtual Hard Disk (VHDX) allows an unauthorized attacker to elevate privileges locally.

Improper link resolution before file access ('link following') in Service Fabric allows an authorized attacker to elevate privileges locally.

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Input Method Editor (IME) allows an authorized attacker to elevate privileges over a network.

**What type of information could be disclosed by this vulnerability?** Exploiting this vulnerability could allow the disclosure of certain kernel memory content.

**What privileges could be gained by an attacker who successfully exploited the vulnerability?** A local, authenticated attacker could gain elevated local system or administrator privileges through a vulnerability in the Win32k.sys driver.

Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

Improper link resolution before file access ('link following') in Microsoft PC Manager allows an authorized attacker to elevate privileges locally.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.