Index: /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp	(revision 55005)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIMachineLogic.cpp	(revision 55006)
@@ -624,4 +624,8 @@
         return;
 
+    /* Check if we accidentally trying to manipulate LEDs when host LEDs state was deallocated. */
+    if (!m_pHostLedsState)
+        return;
+
 #if defined(Q_WS_MAC)
     DarwinHidDevicesBroadcastLeds(m_pHostLedsState, uisession()->isNumLock(), uisession()->isCapsLock(), uisession()->isScrollLock());