The do_change_type function in fs/namespace.c in the Linux kernel before 2.6.22 does not verify that the caller has the CAP_SYS_ADMIN capability, which allows local users to gain privileges or cause a denial of service by modifying the properties of a mountpoint.
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2008-07/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2008-10/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2008-11/msg00001.html
https://bugzilla.redhat.com/show_bug.cgi?id=454388
https://exchange.xforce.ibmcloud.com/vulnerabilities/43696
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10437
http://www.debian.org/security/2008/dsa-1630