diff --git a/interfaces/inner_api/syscap_interface.c b/interfaces/inner_api/syscap_interface.c
index 7ac6a934e1e3ab1f2570383219a9beebff47315e..1b17c15ae2aa67b51cabe451d82d9e5912f18bfc 100644
--- a/interfaces/inner_api/syscap_interface.c
+++ b/interfaces/inner_api/syscap_interface.c
@@ -395,6 +395,7 @@ char *DecodeRpcidToStringFormat(const char *inputFile)
     ret = sprintf_s(outBuffer, outBufferLen, "%u", outUint[0]);
     if (ret == -1) {
         PRINT_ERR("sprintf_s failed.\n");
+        free(outBuffer);
         outBuffer = NULL;
         goto FREE_MALLOC_PRISYSCAP;
     }
@@ -402,6 +403,7 @@ char *DecodeRpcidToStringFormat(const char *inputFile)
         ret = sprintf_s(outBuffer, outBufferLen, "%s,%u", outBuffer, outUint[i]);
         if (ret == -1) {
             PRINT_ERR("sprintf_s failed.\n");
+            free(outBuffer);
             outBuffer = NULL;
             goto FREE_MALLOC_PRISYSCAP;
         }
@@ -412,6 +414,7 @@ char *DecodeRpcidToStringFormat(const char *inputFile)
                         priSyscapArray + i * SINGLE_SYSCAP_LEN);
         if (ret == -1) {
             PRINT_ERR("sprintf_s failed.\n");
+            free(outBuffer);
             outBuffer = NULL;
             goto FREE_MALLOC_PRISYSCAP;
         }