diff --git a/ext/pcre/php_pcre.c b/ext/pcre/php_pcre.c
index fcf4c45f26b..19068b90c0d 100644
--- a/ext/pcre/php_pcre.c
+++ b/ext/pcre/php_pcre.c
@@ -1754,8 +1754,10 @@ matched:
 						}
 						if (preg_get_backref(&walk, &backref)) {
 							if (backref < count) {
-								match_len = offsets[(backref<<1)+1] - offsets[backref<<1];
-								walkbuf = zend_mempcpy(walkbuf, subject + offsets[backref << 1], match_len);
+								if (offsets[backref<<1] < SIZE_MAX) {
+									match_len = offsets[(backref<<1)+1] - offsets[backref<<1];
+									walkbuf = zend_mempcpy(walkbuf, subject + offsets[backref << 1], match_len);
+								}
 							}
 							continue;
 						}
diff --git a/ext/pcre/tests/gh16184.phpt b/ext/pcre/tests/gh16184.phpt
new file mode 100644
index 00000000000..ba915d19af7
--- /dev/null
+++ b/ext/pcre/tests/gh16184.phpt
@@ -0,0 +1,13 @@
+--TEST--
+GH-16184 (UBSan address overflowed in ext/pcre/php_pcre.c)
+--CREDITS--
+YuanchengJiang
+--FILE--
+<?php
+
+$string = 'This is a string. It contains numbers (0*9) as well as parentheses and some other things!';
+echo preg_replace(array('/\b\w{1}s/', '/(\d{1})*(\d{1})/', '/[\(!\)]/'), array('test', '$1 to $2', '*'), $string), "\n";
+
+?>
+--EXPECT--
+This test a string. It contains numbers * to 0* to 9* test well test parentheses and some other things*