Ubuntu Security Notice 892-1 – Ronald Volgers discovered that FUSE did not correctly check mount locations. A local attacker, with access to use FUSE, could unmount arbitrary locations, leading to a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/85747/USN-892-1.txt
Source: https://packetstormsecurity.com/files/85747/Ubuntu-Security-Notice-892-1.html