pam_console does not properly restore ownership for certain console devices when there are multiple users logged into the console and one user logs out, which might allow local users to gain privileges.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11483
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=230823
http://www.vupen.com/english/advisories/2007/3229
http://www.redhat.com/support/errata/RHSA-2007-0737.html
http://www.redhat.com/support/errata/RHSA-2007-0555.html
http://www.redhat.com/support/errata/RHSA-2007-0465.html
http://support.avaya.com/elmodocs2/security/ASA-2007-526.htm
http://security.gentoo.org/glsa/glsa-200711-23.xml
http://secunia.com/advisories/28319
http://secunia.com/advisories/27706
http://secunia.com/advisories/27590
http://secunia.com/advisories/26909
http://secunia.com/advisories/25894
http://secunia.com/advisories/25631
http://lists.grok.org.uk/pipermail/full-disclosure/2007-September/065902.html