Linux Kernel 4.14.0-rc4+ - 'waitid()' Privilege Escalation(CVE-2017-5123)

This is a guest post by a young and talented Portuguese exploiter, Federico Bento. He won this year’s Pwnie for Epic Achievement exploiting TIOCSTI ioctl. Days ago he posted a video demonstrating an exploit for CVE-2017-5123 and luckly for you I managed to convince him to do a write-up about it. ...