KDE kdelibs before 4.14.32 and KAuth before 5.34 allow local users to gain root privileges by spoofing a callerID and leveraging a privileged helper app.
https://www.kde.org/info/security/advisory-20170510-1.txt
https://www.exploit-db.com/exploits/42053/
https://security.gentoo.org/glsa/201706-29
https://cgit.kde.org/kdelibs.git/commit/?id=264e97625abe2e0334f97de17f6ffb52582888ab
https://cgit.kde.org/kauth.git/commit/?id=df875f725293af53399f5146362eb158b4f9216a
https://bugzilla.redhat.com/show_bug.cgi?id=1449647
https://access.redhat.com/errata/RHSA-2017:1264
http://www.securitytracker.com/id/1038480
http://www.securityfocus.com/bid/98412