diff -Nru konversation-1.5/debian/changelog konversation-1.5/debian/changelog
--- konversation-1.5/debian/changelog	2014-11-04 18:50:21.000000000 +0000
+++ konversation-1.5/debian/changelog	2017-11-21 23:11:40.000000000 +0000
@@ -1,3 +1,13 @@
+konversation (1.5-1ubuntu1.14.04.2) trusty-security; urgency=high
+
+  * SECURITY UPDATE: Crash in IRC message parsing (LP: #1731797):
+    - kubuntu_03_CVE-2017-15923.diff: ensure integer overflow has not
+      happened
+    - CVE-2017-15923
+    - https://www.kde.org/info/security/advisory-20171112-1.txt
+
+ -- Simon Quigley <tsimonq2@ubuntu.com>  Tue, 21 Nov 2017 15:11:10 -0800
+
 konversation (1.5-1ubuntu1.14.04.1) trusty-security; urgency=medium
 
   * SECURITY UPDATE: out-of-bounds read on a heap-allocated array LP: #1389296
diff -Nru konversation-1.5/debian/patches/kubuntu_03_CVE-2017-15923.diff konversation-1.5/debian/patches/kubuntu_03_CVE-2017-15923.diff
--- konversation-1.5/debian/patches/kubuntu_03_CVE-2017-15923.diff	1970-01-01 00:00:00.000000000 +0000
+++ konversation-1.5/debian/patches/kubuntu_03_CVE-2017-15923.diff	2017-11-21 23:11:07.000000000 +0000
@@ -0,0 +1,31 @@
+Description: Stay within bounds
+ This patch fixes CVE-2017-15923.
+Author: Eli MacKenzie <argonel@gmail.com>
+Origin: upstream
+Bug: https://www.kde.org/info/security/advisory-20171112-1.txt
+Bug-Ubuntu: https://bugs.launchpad.net/bugs/1731797
+Applied-Upstream: 6a7f59ee1b9dbc6e5cf9e5f3b306504d02b73ef0
+Reviewed-by: Eike Hein <hein@kde.org>
+Last-Update: 2017-11-12
+--- a/src/viewer/ircview.cpp
++++ b/src/viewer/ircview.cpp
+@@ -1637,7 +1637,8 @@ QString IRCView::closeToTagString(TextHt
+     }
+ 
+     // reopen relevant tags
+-    ret += openTags(data, i);
++    if (i > -1)
++        ret += openTags(data, i);
+ 
+     return ret;
+ }
+@@ -1645,7 +1646,8 @@ QString IRCView::closeToTagString(TextHt
+ QString IRCView::openTags(TextHtmlData* data, int from)
+ {
+     QString ret, tag;
+-    int i = from;
++    int i = from > -1 ? from : 0;
++
+     for ( ;  i < data->openHtmlTags.count(); ++i)
+     {
+         tag = data->openHtmlTags.at(i);
diff -Nru konversation-1.5/debian/patches/series konversation-1.5/debian/patches/series
--- konversation-1.5/debian/patches/series	2014-11-04 17:05:19.000000000 +0000
+++ konversation-1.5/debian/patches/series	2017-11-21 23:11:07.000000000 +0000
@@ -2,3 +2,4 @@
 #debian_channel.diff
 kubuntu_01_default_channels.diff
 kubuntu_02_cve-2014-8483.diff
+kubuntu_03_CVE-2017-15923.diff