diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyconfigdistributedhardware_fuzzer/configdistributedhardware_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyconfigdistributedhardware_fuzzer/configdistributedhardware_fuzzer.cpp
index f71fa60975971be07c2b74fff9840e22f0ce1f33..ee74553a51dff8843267557bc0e26015c9e08258 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyconfigdistributedhardware_fuzzer/configdistributedhardware_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyconfigdistributedhardware_fuzzer/configdistributedhardware_fuzzer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -27,7 +27,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void ConfigDistributedHardwareFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
+    if ((data == nullptr) || (size < sizeof(int32_t))) {
         return;
     }
 
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyregisterdistributedhardware_fuzzer/registerdistributedhardware_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyregisterdistributedhardware_fuzzer/registerdistributedhardware_fuzzer.cpp
index ab96db45b9449e7e1d4e7faa1eb37b8fd0691dc6..1be5ab181acdd0dcd737945da1887bf875b30e99 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyregisterdistributedhardware_fuzzer/registerdistributedhardware_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyregisterdistributedhardware_fuzzer/registerdistributedhardware_fuzzer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -28,7 +28,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void RegisterDistributedHardwareFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
+    if ((data == nullptr) || (size < sizeof(int32_t))) {
         return;
     }
 
diff --git a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyunregisterdistributedhardware_fuzzer/unregisterdistributedhardware_fuzzer.cpp b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyunregisterdistributedhardware_fuzzer/unregisterdistributedhardware_fuzzer.cpp
index bc050c5fa43d9612b01b6154171546f4995f4013..0ea81e3b4b0812f536ee8bce128760408397dabd 100644
--- a/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyunregisterdistributedhardware_fuzzer/unregisterdistributedhardware_fuzzer.cpp
+++ b/interfaces/innerkits/native_cpp/test/fuzztest/dscreen_source_proxy/proxyunregisterdistributedhardware_fuzzer/unregisterdistributedhardware_fuzzer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -28,7 +28,7 @@ namespace OHOS {
 namespace DistributedHardware {
 void UnregisterDistributedHardwareFuzzTest(const uint8_t* data, size_t size)
 {
-    if ((data == nullptr) || (size == 0)) {
+    if ((data == nullptr) || (size < sizeof(int32_t))) {
         return;
     }