diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c
index 6d9649776ae7..405b23e21473 100644
--- a/drivers/bluetooth/btintel_pcie.c
+++ b/drivers/bluetooth/btintel_pcie.c
@@ -404,6 +404,12 @@ static int btintel_pcie_send_sync(struct btintel_pcie_data *data,
 	if (tfd_index > txq->count)
 		return -ERANGE;
 
+	if (skb->len > BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN) {
+		bt_dev_err(hdev, "TX skb too large (%u > %u)", skb->len,
+			   BTINTEL_PCIE_BUFFER_SIZE - BTINTEL_PCIE_HCI_TYPE_LEN);
+		return -EMSGSIZE;
+	}
+
 	/* Firmware raises alive interrupt on HCI_OP_RESET or
 	 * BTINTEL_HCI_OP_RESET
 	 */