diff --git a/NEWS b/NEWS
index 133a202cb79..371ec372381 100644
--- a/NEWS
+++ b/NEWS
@@ -20,12 +20,14 @@ PHP                                                                        NEWS
 ?? ??? 2013, PHP 5.4.16
 
 - Core:
-  . Fixed bug #64720 (SegFault on zend_deactivate). (Dmitry)
-  . Fixed bug #64729 (compilation failure on x32). (Gustavo)
-  . Fixed bug #64660 (Segfault on memory exhaustion within function definition).
-    (Stas, reported by Juha Kylmänen)
+  . Fixed bug #64879 (Heap based buffer overflow in quoted_printable_encode,
+    CVE 2013-2110). (Stas)
   . Fixed bug #64853 (Use of no longer available ini directives causes crash on
     TS build). (Anatol)
+  . Fixed bug #64729 (compilation failure on x32). (Gustavo)
+  . Fixed bug #64720 (SegFault on zend_deactivate). (Dmitry)
+  . Fixed bug #64660 (Segfault on memory exhaustion within function definition).
+    (Stas, reported by Juha Kylmänen)
 
 - Calendar:
   . Fixed bug #64895 (Integer overflow in SndToJewish). (Remi)
diff --git a/ext/standard/quot_print.c b/ext/standard/quot_print.c
index 28dcc63f132..0df127362f4 100644
--- a/ext/standard/quot_print.c
+++ b/ext/standard/quot_print.c
@@ -151,7 +151,7 @@ PHPAPI unsigned char *php_quot_print_encode(const unsigned char *str, size_t len
 	unsigned char c, *ret, *d;
 	char *hex = "0123456789ABCDEF";
 
-	ret = safe_emalloc(1, 3 * length + 3 * (((3 * length)/PHP_QPRINT_MAXL) + 1), 0);
+	ret = safe_emalloc(3, length + (((3 * length)/(PHP_QPRINT_MAXL-9)) + 1), 1);
 	d = ret;
 
 	while (length--) {
@@ -286,4 +286,4 @@ PHP_FUNCTION(quoted_printable_encode)
  * End:
  * vim600: sw=4 ts=4 fdm=marker
  * vim<600: sw=4 ts=4
- */
\ No newline at end of file
+ */
diff --git a/ext/standard/tests/strings/bug64879.phpt b/ext/standard/tests/strings/bug64879.phpt
new file mode 100644
index 00000000000..1df90c6d85c
--- /dev/null
+++ b/ext/standard/tests/strings/bug64879.phpt
@@ -0,0 +1,12 @@
+--TEST--
+Bug #64879: quoted_printable_encode() wrong size calculation (CVE-2013-2110)
+--FILE--
+<?php
+
+quoted_printable_encode(str_repeat("\xf4", 1000)); 
+quoted_printable_encode(str_repeat("\xf4", 100000)); 
+
+echo "Done\n";
+?>
+--EXPECTF--	
+Done