diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c
index c3e3f3a3d8f9..b8526219eceb 100644
--- a/drivers/s390/crypto/zcrypt_ccamisc.c
+++ b/drivers/s390/crypto/zcrypt_ccamisc.c
@@ -946,7 +946,8 @@ static int _ip_cprb_helper(u16 cardnr, u16 domain,
 			   const u8 *clr_key_value,
 			   int clr_key_bit_size,
 			   u8 *key_token,
-			   int *key_token_size)
+			   int *key_token_size,
+			   bool scrub)
 {
 	int rc, n;
 	u8 *mem, *ptr;
@@ -1087,7 +1088,7 @@ static int _ip_cprb_helper(u16 cardnr, u16 domain,
 	*key_token_size = t->len;
 
 out:
-	free_cprbmem(mem, PARMBSIZE, 0);
+	free_cprbmem(mem, PARMBSIZE, scrub);
 	return rc;
 }
 
@@ -1130,7 +1131,8 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
 	 * 4/4 COMPLETE the secure cipher key import
 	 */
 	rc = _ip_cprb_helper(card, dom, "AES     ", "FIRST   ", "MIN3PART",
-			     exorbuf, keybitsize, token, &tokensize);
+			     exorbuf, keybitsize, token, &tokensize,
+			     true);
 	if (rc) {
 		DEBUG_ERR(
 			"%s clear key import 1/4 with CSNBKPI2 failed, rc=%d\n",
@@ -1138,7 +1140,8 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
 		goto out;
 	}
 	rc = _ip_cprb_helper(card, dom, "AES     ", "ADD-PART", NULL,
-			     clrkey, keybitsize, token, &tokensize);
+			     clrkey, keybitsize, token, &tokensize,
+			     true);
 	if (rc) {
 		DEBUG_ERR(
 			"%s clear key import 2/4 with CSNBKPI2 failed, rc=%d\n",
@@ -1146,7 +1149,8 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
 		goto out;
 	}
 	rc = _ip_cprb_helper(card, dom, "AES     ", "ADD-PART", NULL,
-			     exorbuf, keybitsize, token, &tokensize);
+			     exorbuf, keybitsize, token, &tokensize,
+			     true);
 	if (rc) {
 		DEBUG_ERR(
 			"%s clear key import 3/4 with CSNBKPI2 failed, rc=%d\n",
@@ -1154,7 +1158,8 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
 		goto out;
 	}
 	rc = _ip_cprb_helper(card, dom, "AES     ", "COMPLETE", NULL,
-			     NULL, keybitsize, token, &tokensize);
+			     NULL, keybitsize, token, &tokensize,
+			     true);
 	if (rc) {
 		DEBUG_ERR(
 			"%s clear key import 4/4 with CSNBKPI2 failed, rc=%d\n",
@@ -1172,7 +1177,8 @@ int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
 	*keybufsize = tokensize;
 
 out:
-	kfree(token);
+	memzero_explicit(exorbuf, sizeof(exorbuf));
+	kfree_sensitive(token);
 	return rc;
 }
 EXPORT_SYMBOL(cca_clr2cipherkey);