diff -Nur bridge-utils-1.5-old/brctl/brctl_cmd.c bridge-utils-1.5/brctl/brctl_cmd.c
--- bridge-utils-1.5-old/brctl/brctl_cmd.c	2018-05-17 07:03:02.868000000 -0400
+++ bridge-utils-1.5/brctl/brctl_cmd.c	2018-05-17 07:07:26.023000000 -0400
@@ -250,11 +250,20 @@
 static int br_cmd_setpathcost(int argc, char *const* argv)
 {
 	int cost, err;
+	int temp=0;
 
 	if (sscanf(argv[3], "%i", &cost) != 1) {
 		fprintf(stderr, "bad path cost value\n");
 		return 1;
 	}
+	while(*(argv[3]+temp)){
+		if(*(argv[3]+temp)<'0'||*(argv[3]+temp)>(9+'0')){
+			fprintf(stderr, "bad path cost value\n");
+			return 1;
+		}
+		temp++;
+	}
+
 
 	err = br_set_path_cost(argv[1], argv[2], cost);
 	if (err)
@@ -266,11 +275,19 @@
 static int br_cmd_setportprio(int argc, char *const* argv)
 {
 	int cost, err;
+	int temp=0;
 
 	if (sscanf(argv[3], "%i", &cost) != 1) {
 		fprintf(stderr, "bad path priority value\n");
 		return 1;
 	}
+	while(*(argv[3]+temp)){
+		if(*(argv[3]+temp)<'0'||*(argv[3]+temp)>(9+'0')){
+			fprintf(stderr, "bad path priority value\n");
+			return 1;
+		}
+		temp++;
+	}
 
 	err = br_set_port_priority(argv[1], argv[2], cost);
 	if (err)