diff --git a/src/gausskernel/security/keymgr/localkms/security_localkms.cpp b/src/gausskernel/security/keymgr/localkms/security_localkms.cpp
index 079031f69..cf55fd08c 100644
--- a/src/gausskernel/security/keymgr/localkms/security_localkms.cpp
+++ b/src/gausskernel/security/keymgr/localkms/security_localkms.cpp
@@ -532,6 +532,7 @@ KmUnStr kms_mk_encrypt(KeyMgr *kmgr, KeyInfo info, KmUnStr plain)
 
     cipher.val = _cipher->ustr_val;
     cipher.len = _cipher->ustr_len;
+    km_safe_free(_cipher);
     return cipher;
 }