The mmap function in the Linux Kernel 2.6.10 can be used to create memory maps with a start address beyond the end address, which allows local users to cause a denial of service (kernel crash).
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10466
http://www.securityfocus.com/bid/13893
http://www.securityfocus.com/archive/1/427980/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2005-514.html
http://www.debian.org/security/2005/dsa-922
http://securitytracker.com/id?1014152