QNX Neutrino RTOS 6.3.0 allows local users to cause a denial of service (hang) by supplying a "break *0xb032d59f" command to gdb.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24553
http://www.vupen.com/english/advisories/2006/0474
http://www.securityfocus.com/bid/16539