kcheckpass in KDE 3.2.0 up to 3.4.2 allows local users to gain root access via a symlink attack on lock files.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9388
http://www.ubuntu.com/usn/usn-176-1
http://www.suresec.org/advisories/adv6.pdf
http://www.securityfocus.com/bid/14736
http://www.redhat.com/support/errata/RHSA-2006-0582.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:160
http://www.kde.org/info/security/advisory-20050905-1.txt
http://www.debian.org/security/2005/dsa-815
http://secunia.com/advisories/21481
http://secunia.com/advisories/18139
http://secunia.com/advisories/16692