diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index fa49529682ce..c20f69a4c5e9 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2661,6 +2661,9 @@ static int gsmld_open(struct tty_struct *tty)
 {
 	struct gsm_mux *gsm;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (tty->ops->write == NULL)
 		return -EINVAL;