Ticket #11695: 11695-2.diff

wp-includes/functions.php

@@ -1741 +1741 @@
                 wp_die( $message, '', array( 'response' => 404 ) );
         }
 
-        do_action( $hook, $wp_query->is_comment_feed );
+        if ( $wp_query->is_comment_feed && $wp_query->is_singular && ( !current_user_can( 'read_private_posts' ) && 'private' == $wp_query->post->post_status ) ) 
+                include_once( get_404_template() ); 
+        else 
+                do_action( $hook, $wp_query->is_comment_feed );
 }
 
 /**