diff --git a/window_scene/session_manager/src/zidl/scene_session_manager_proxy.cpp b/window_scene/session_manager/src/zidl/scene_session_manager_proxy.cpp
index 6c750ea09f1e3a90828f6de53b0d53bd891f96c6..d284253dd49a06f71b726dde439462e24a562564 100644
--- a/window_scene/session_manager/src/zidl/scene_session_manager_proxy.cpp
+++ b/window_scene/session_manager/src/zidl/scene_session_manager_proxy.cpp
@@ -3274,6 +3274,10 @@ WMError SceneSessionManagerProxy::GetDisplayIdByWindowId(const std::vector<uint6
         TLOGE(WmsLogTag::WMS_ATTRIBUTE, "Fail to read mapSize");
         return WMError::WM_ERROR_IPC_FAILED;
     }
+    if (mapSize < 0) {
+        TLOGE(WmsLogTag::WMS_ATTRIBUTE, "MapSize is invalid");
+        return WMError::WM_ERROR_IPC_FAILED;
+    }
     for (int32_t i = 0; i < mapSize; i++) {
         uint64_t windowId;
         if (!reply.ReadUint64(windowId)) {