CTurt
Biography:
CTurt is a security researcher who is primarily interested in FreeBSD kernel. He has discovered critical and security bugs to the FreeBSD kernel like CVE-2016-1886 - SETFKEY FreeBSD kernel vulnerability, CVE-2016-1887 - sendmsg FreeBSD kernel heap overflow, and some stack disclosure vulnerabilities in FreeBSD compatibility layers. He has also written a collection of PS4 tools and experiments using the WebKit exploit because he was able to successfully jailbreak the PlayStation 4 (works with version 1.76 of PS4 firmware but it can be made to run on a newer firmware.). He used a FreeBSD kernel exploit to attain the jailbreak.