daemon/Greeter.cpp in sddm before 0.13.0 does not properly disable the KDE crash handler, which allows local users to gain privileges by crashing a greeter when using certain themes, as demonstrated by the plasma-workspace breeze theme.
{ "urgency": "low" }
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2015-0856.json"