diff -urNp N/snmplib/snmpusm.c M/snmplib/snmpusm.c
--- N/snmplib/snmpusm.c	2019-03-04 13:02:27.989775985 +0100
+++ M/snmplib/snmpusm.c	2019-03-04 14:16:50.977619867 +0100
@@ -1842,7 +1842,7 @@ usm_rgenerate_out_msg(int msgProcModel,
     /*
      * endif -- create keyed hash 
      */
-    usm_free_usmStateReference(secStateRef);
+//    usm_free_usmStateReference(secStateRef);
     DEBUGMSGTL(("usm", "USM processing completed.\n"));
     return SNMPERR_SUCCESS;
 }                               /* end usm_rgenerate_out_msg() */