--- old/src/java.base/share/classes/java/io/Serializable.java	2018-03-28 13:15:06.396783882 -0400
+++ new/src/java.base/share/classes/java/io/Serializable.java	2018-03-28 13:15:06.028599882 -0400
@@ -27,7 +27,17 @@
 
 /**
  * Serializability of a class is enabled by the class implementing the
- * java.io.Serializable interface. Classes that do not implement this
+ * java.io.Serializable interface.
+ *
+ * <p><strong>Warning: Deserialization of untrusted data is inherently dangerous
+ * and should be avoided. Untrusted data should be carefully validated according to the
+ * "Serialization and Deserialization" section of the
+ * {@extLink secure_coding_guidelines_javase Secure Coding Guidelines for Java SE}.
+ * {@extLink serialization_filter_guide Serialization Filtering} describes best
+ * practices for defensive use of serial filters.
+ * </strong></p>
+ *
+ * Classes that do not implement this
  * interface will not have any of their state serialized or
  * deserialized.  All subtypes of a serializable class are themselves
  * serializable.  The serialization interface has no methods or fields