From 61a601e6e22eae1cfb40b1e0d49d5ad4dbec637c Mon Sep 17 00:00:00 2001
From: Istemon <248831556+istemon@users.noreply.github.com>
Date: Sat, 10 Jan 2026 01:43:30 +0000
Subject: [PATCH] Return 'invalid handle' for malformed read by type request

---
 bumble/gatt_server.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/bumble/gatt_server.py b/bumble/gatt_server.py
index 29e4c28..02f52a7 100644
--- a/bumble/gatt_server.py
+++ b/bumble/gatt_server.py
@@ -777,6 +777,18 @@ class Server(utils.EventEmitter):
             error_code=att.ATT_ATTRIBUTE_NOT_FOUND_ERROR,
         )
 
+        if (
+            request.starting_handle == 0x0000
+            or request.starting_handle > request.ending_handle
+        ):
+            response = att.ATT_Error_Response(
+                request_opcode_in_error=request.op_code,
+                attribute_handle_in_error=request.starting_handle,
+                error_code=att.ATT_INVALID_HANDLE_ERROR,
+            )
+            self.send_response(bearer, response)
+            return
+
         attributes: list[tuple[int, bytes]] = []
         for attribute in (
             attribute