diff -Nru kdepim-addons-17.12.3/debian/changelog kdepim-addons-17.12.3/debian/changelog
--- kdepim-addons-17.12.3/debian/changelog	2018-03-16 13:26:02.000000000 +0000
+++ kdepim-addons-17.12.3/debian/changelog	2018-04-21 04:52:33.000000000 +0000
@@ -1,3 +1,9 @@
+kdepim-addons (17.12.3-0ubuntu2) bionic; urgency=high
+
+  * Fix memory leak caused by certain calendar events (LP: #1765900).
+
+ -- Simon Quigley <tsimonq2@ubuntu.com>  Fri, 20 Apr 2018 23:52:33 -0500
+
 kdepim-addons (17.12.3-0ubuntu1) bionic; urgency=medium
 
   [ Rik Mills ]
diff -Nru kdepim-addons-17.12.3/debian/patches/fix-memory-leak-with-calendar-events.patch kdepim-addons-17.12.3/debian/patches/fix-memory-leak-with-calendar-events.patch
--- kdepim-addons-17.12.3/debian/patches/fix-memory-leak-with-calendar-events.patch	1970-01-01 00:00:00.000000000 +0000
+++ kdepim-addons-17.12.3/debian/patches/fix-memory-leak-with-calendar-events.patch	2018-04-21 04:52:33.000000000 +0000
@@ -0,0 +1,22 @@
+Description: Fix an issue which causes Plasma to freeze when there is an agenda item with no start date in the calendar
+Author: Kai Uwe Broulik <kde@privat.broulik.de>
+Bug: https://bugs.kde.org/show_bug.cgi?id=367541
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1765900
+Applied-Upstream: commit:af23ae
+Last-Update: 2018-04-20
+--- a/plugins/plasma/pimeventsplugin/eventdatavisitor.cpp
++++ b/plugins/plasma/pimeventsplugin/eventdatavisitor.cpp
+@@ -170,6 +170,13 @@ void EventDataVisitor::insertResult(cons
+ {
+     QDate d = result.startDateTime().date();
+     const QDate end = result.endDateTime().date();
++
++    // Agenda without start date will be placed at the end (due) date
++    if (!d.isValid()) {
++        mResults.insert(end, result);
++        return;
++    }
++
+     while (d <= end) {
+         mResults.insert(d, result);
+         d = d.addDays(1);
diff -Nru kdepim-addons-17.12.3/debian/patches/series kdepim-addons-17.12.3/debian/patches/series
--- kdepim-addons-17.12.3/debian/patches/series	2018-03-16 13:26:02.000000000 +0000
+++ kdepim-addons-17.12.3/debian/patches/series	2018-04-21 04:51:05.000000000 +0000
@@ -1,2 +1,3 @@
 remove_sh_extensions
 spambayes.patch
+fix-memory-leak-with-calendar-events.patch