source: http://www.securityfocus.com/bid/41250/info

Qt is prone to a denial-of-service vulnerability caused by an infinite loop condition.

An attacker can exploit this issue to make the affected application unresponsive, denying service to legitimate users.

The issue affects Qt versions 4.6.3 and prior. 

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/34227.zip