diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 1dd41d4..f3fec42 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1430,6 +1430,12 @@
 		goto unlock;
 	}
 
+	if ((cp->minor & 0x03) != 0 || (cp->major & 0xe0) != 0) {
+		err = cmd_status(sk, hdev->id, MGMT_OP_SET_DEV_CLASS,
+				 MGMT_STATUS_INVALID_PARAMS);
+		goto unlock;
+	}
+
 	hdev->major_class = cp->major;
 	hdev->minor_class = cp->minor;