diff --git a/debian/changelog b/debian/changelog
index af0e9fe..2283391 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -11,6 +11,9 @@ gfxboot-theme-ubuntu (0.1.18) UNRELEASED; urgency=low
     Bokmål, Polish, Portuguese, Portuguese (Brazil), Romanian, Russian,
     Slovak, Swedish, Chinese (China), Chinese (Taiwan).
   * Update font to add newly-required characters.
+  * Fix memory handling in isolinux.cfg parser: take copies of all labels,
+    and free a pointer to the start of the file, not the end (closes: Malone
+    #34592).
 
  -- Colin Watson <cjwatson@ubuntu.com>  Tue,  4 Apr 2006 16:25:30 +0100
 
diff --git a/menuconfig.inc b/menuconfig.inc
index 93a0017..b8ec583 100644
--- a/menuconfig.inc
+++ b/menuconfig.inc
@@ -225,11 +225,11 @@
       } { pop } ifelse
     } if
     dup "label" eq {
-      over menuconfig.skipspace /menuconfig.curlabel exch def
+      over menuconfig.skipspace strdup /menuconfig.curlabel exch def
     } if
     dup "menu" eq {
       over menuconfig.skipspace menuconfig.keyword
-      dup "label" eq { over menuconfig.skipspace menuconfig.sethuman } if
+      dup "label" eq { over menuconfig.skipspace strdup menuconfig.sethuman } if
       dup "hide" eq { menuconfig.hidelabel } if
       free rot pop exch
     } if
@@ -237,7 +237,8 @@
 
     % skip to end of line
     dup length add
-  } loop free
+  } loop pop
+  menuconfig.file free
 
   menuconfig.humans menuconfig.entries menuconfig.args
 } def