diff --git a/src/utility/HCI.cpp b/src/utility/HCI.cpp
index f158d035..6a8869d3 100644
--- a/src/utility/HCI.cpp
+++ b/src/utility/HCI.cpp
@@ -657,6 +657,10 @@ void HCIClass::handleEventPkt(uint8_t /*plen*/, uint8_t pdata[])
         uint8_t eirData[31];
       } *leAdvertisingReport = (EvtLeAdvertisingReport*)&pdata[sizeof(HCIEventHdr) + sizeof(LeMetaEventHeader)];
 
+      if(leAdvertisingReport->eirLength > sizeof(leAdvertisingReport->eirData)){
+        return ;
+      }
+
       if (leAdvertisingReport->status == 0x01) {
         // last byte is RSSI
         int8_t rssi = leAdvertisingReport->eirData[leAdvertisingReport->eirLength];