Race condition in phfont in QNX Neutrino RTOS 6.2.1 allows local users to execute arbitrary code via unspecified manipulations of the PHFONT and PHOTON2_PATH environment variables.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24555
http://www.vupen.com/english/advisories/2006/0474
http://www.securityfocus.com/bid/16539
http://www.idefense.com/intelligence/vulnerabilities/display.php?id=383