Microsoft Windows Graphics Device Interface+, also known as GDI+, allows various applications to use different graphics functionality on video displays as well as printers. Windows applications don’t directly access graphics hardware such as device drivers, but they interact with GDI, which in turn then interacts with device drivers. In this way, there is an abstraction layer to Windows applications and a common set of APIs for everyone to use.
Because of its complex format, GDI+ has a known history of various vulnerabilities. We at McAfee continuously fuzz various open source and closed source software including windows GDI+. Over the last few years, we have reported various issues to Microsoft in various Windows components including GDI+ and have received CVEs for them.
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Source: McAfee