Race condition in workspace/krunner/lock/lockdlg.cc in the KRunner lock module in kdebase in KDE SC 4.4.0 allows physically proximate attackers to bypass KScreenSaver screen locking and access an unattended workstation by pressing the Enter key at a certain time, related to multiple forked processes.
https://bugzilla.novell.com/show_bug.cgi?id=579280
https://bugs.kde.org/show_bug.cgi?id=217882
http://www.vupen.com/english/advisories/2010/0409
http://www.openwall.com/lists/oss-security/2010/02/17/3
http://www.kde.org/info/security/advisory-20100217-1.txt
http://websvn.kde.org/?view=revision&revision=1089241
http://websvn.kde.org/?revision=1089213&view=revision
http://securitytracker.com/id?1023641
http://secunia.com/advisories/38600
http://marc.info/?l=oss-security&m=126600468622421&w=2
http://marc.info/?l=oss-security&m=126599909614401&w=2