diff --git a/common/src/ipc/standard/ipc_model_codec.cpp b/common/src/ipc/standard/ipc_model_codec.cpp
index 2e336c5fd53edbeca9293ec8f9539a453c9c91c8..d5376c7d5d630073c9c73e3d231d2a1c53d9f8b8 100644
--- a/common/src/ipc/standard/ipc_model_codec.cpp
+++ b/common/src/ipc/standard/ipc_model_codec.cpp
@@ -426,6 +426,10 @@ bool IpcModelCodec::DecodeLocalServiceInfos(MessageParcel &parcel, std::vector<D
     uint32_t num = 0;
     READ_HELPER_RET(parcel, Uint32, num, false);
     bool bRet = true;
+    if (num > IPC_VECTOR_MAX_SIZE || num < 0) {
+        LOGE("num is Invalid value, num = %{public}u", num);
+        return false;
+    }
     for (uint32_t k = 0; k < num; k++) {
         DMLocalServiceInfo serviceInfo;
         bRet = DecodeLocalServiceInfo(parcel, serviceInfo);
@@ -482,7 +486,7 @@ bool IpcModelCodec::DecodeStringVector(MessageParcel &parcel, std::vector<std::s
 {
     uint32_t num = 0;
     READ_HELPER_RET(parcel, Uint32, num, false);
-    if (num > IPC_VECTOR_MAX_SIZE) {
+    if (num > IPC_VECTOR_MAX_SIZE || num < 0) {
         LOGE("num is Invalid value, num = %{public}u", num);
         return false;
     }
diff --git a/services/implementation/include/ability/dm_dialog_manager.h b/services/implementation/include/ability/dm_dialog_manager.h
index 2b2ad90f20a2cf3373d629ac12a279d889cc52b6..22f002b956df2729c66f600d847ce50ca3300dfc 100644
--- a/services/implementation/include/ability/dm_dialog_manager.h
+++ b/services/implementation/include/ability/dm_dialog_manager.h
@@ -56,8 +56,8 @@ private:
     std::string customDescriptionStr_;
     std::string pinCode_;
     std::string hostPkgLabel_;
-    int32_t deviceType_;
-    bool isProxyBind_;
+    int32_t deviceType_ = -1;
+    bool isProxyBind_ = false;
     std::string appUserData_;
     std::string title_;
     std::mutex mutex_;