From f637dd14aad00231958fb9c211cc38b277d816a9 Mon Sep 17 00:00:00 2001
From: stefanbode <stefan_bode@web.de>
Date: Wed, 3 Aug 2022 19:03:42 +0200
Subject: [PATCH] fix #15851

buffer overflow
---
 tasmota/tasmota_xdrv_driver/xdrv_27_shutter.ino | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tasmota/tasmota_xdrv_driver/xdrv_27_shutter.ino b/tasmota/tasmota_xdrv_driver/xdrv_27_shutter.ino
index 8a85c0c2d..1cc517940 100644
--- a/tasmota/tasmota_xdrv_driver/xdrv_27_shutter.ino
+++ b/tasmota/tasmota_xdrv_driver/xdrv_27_shutter.ino
@@ -1767,7 +1767,7 @@ bool Xdrv27(uint8_t function)
         }
       break;
       case FUNC_BUTTON_PRESSED:
-        if (Settings->shutter_button[XdrvMailbox.index] & (1<<31)) {
+        if (XdrvMailbox.index < MAX_SHUTTER_KEYS && Settings->shutter_button[XdrvMailbox.index] & (1<<31)) {
           ShutterButtonHandler();
           result = true;
         }