KDE kdelibs before 4.14 and kauth before 5.1 does not properly use D-Bus for communication with a polkit authority, which allows local users to bypass intended access restrictions by leveraging a PolkitUnixProcess PolkitSubject race condition via a (1) setuid process or (2) pkexec process, related to CVE-2013-4288 and "PID reuse race conditions."
http://www.ubuntu.com/usn/USN-2304-1
http://www.kde.org/info/security/advisory-20140730-1.txt
http://www.debian.org/security/2014/dsa-3004
http://secunia.com/advisories/60654
http://secunia.com/advisories/60633
http://secunia.com/advisories/60385
http://rhn.redhat.com/errata/RHSA-2014-1359.html
http://quickgit.kde.org/?p=kauth.git&a=commit&h=341b7d84b6d9c03cf56905cb277b47e11c81482a
http://lists.opensuse.org/opensuse-updates/2014-08/msg00012.html