diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 1b4abf8e90f6b770a3f01d05f18f1085c03cf8b8..9274d32550493ceddf3cfbe40ee8f98604e70541 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -7200,6 +7200,8 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
 			u16 handle = le16_to_cpu(ev->bis[i]);
 
 			bis = hci_conn_hash_lookup_handle(hdev, handle);
+			if (!bis)
+				continue;
 
 			set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
 			hci_connect_cfm(bis, ev->status);