Ubuntu Security Notice 577-1 – Wojciech Purczynski discovered that the vmsplice system call did not properly perform verification of user-memory pointers. A local attacker could exploit this to overwrite arbitrary kernel memory and gain root privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/63542/USN-577-1.txt
Source: https://packetstormsecurity.com/files/63542/Ubuntu-Security-Notice-577-1.html