The fix for JDK-8159752 put back an older version of the policy permissions for the jdk.crypto.ucrypto module. The permissions for jrt:/jdk.crypto.ucrypto in java.policy had:

   permission java.io.FilePermission "<<ALL FILES>>", "read";

but in the new default.policy it is only:

   permission java.io.FilePermission
                  "${java.home}/conf/security/ucrypto-solaris.cfg", "read";

It was updated in the -addprovider RFE (JDK-8130302) a little while ago.