Backport rev 55450:
SF bug #1721309: Clear data so random memory does not get freed.
diff --git a/Misc/NEWS b/Misc/NEWS
index 67c4750..bc0e974 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -35,6 +35,12 @@
   run in verbose mode.
 
 
+Extension Modules
+-----------------
+
+- Bug #1721309: prevent bsddb module from freeing random memory.
+
+
 Documentation
 -------------