diff --git a/drivers/net/wireless/microchip/wilc1000/wlan.c b/drivers/net/wireless/microchip/wilc1000/wlan.c
index 4b116fe6f9ea..55a77a2e3288 100644
--- a/drivers/net/wireless/microchip/wilc1000/wlan.c
+++ b/drivers/net/wireless/microchip/wilc1000/wlan.c
@@ -1197,6 +1197,15 @@ static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
 	if (size <= 0)
 		return;
 
+	/* A size exceeding the RX buffer is bogus; drop the transfer
+	 * instead of overflowing the buffer.
+	 */
+	if (size > WILC_RX_BUFF_SIZE) {
+		wilc->hif_func->hif_clear_int_ext(wilc,
+						  DATA_INT_CLR | ENABLE_RX_VMM);
+		return;
+	}
+
 	if (WILC_RX_BUFF_SIZE - offset < size)
 		offset = 0;