FreeBSD atkbd SETFKEY Ioctl Privilege Escalation Exploit Update

Incorrect signedness comparison in the ioctl handler of the atkbd keyboard driver in the FreeBSD kernel can be leveraged by a local unprivileged user to overwrite a portion of the kernel memory, thus allowing the attacker to gain root privileges on the affected system. This update improves the checking of preconditions before launching the attack.
Exploit type: 
Platform: 
Vulnerabilty ID: 
CVE-2016-1886
Product Version: 
2016_R1
Released Date: 
Wednesday, July 6, 2016 - 00:00