diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index a7c44a3cb2d2..3b8a8e2d3484 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1932,6 +1932,9 @@ unknown:
 				if (w_index != 0x5 || (w_value >> 8))
 					break;
 				interface = w_value & 0xFF;
+				if (interface >= MAX_CONFIG_INTERFACES ||
+				    !os_desc_cfg->interface[interface])
+					break;
 				buf[6] = w_index;
 				if (w_length == 0x0A) {
 					count = count_ext_prop(os_desc_cfg,