FUSE, possibly 2.8.5 and earlier, allows local users to create mtab entries with arbitrary pathnames, and consequently unmount any filesystem, via a symlink attack on the parent directory of the mountpoint of a FUSE filesystem, a different vulnerability than CVE-2010-0789.
https://exchange.xforce.ibmcloud.com/vulnerabilities/62986
http://www.vupen.com/english/advisories/2011/0302
http://www.vupen.com/english/advisories/2011/0181
http://www.ubuntu.com/usn/USN-1045-2
http://www.ubuntu.com/usn/USN-1045-1
http://www.mandriva.com/security/advisories?name=MDVSA-2013:155
http://secunia.com/advisories/42965
http://secunia.com/advisories/42961
http://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-February/053792.html