diff --git a/crypto/x509v3/v3_utl.c b/crypto/x509v3/v3_utl.c
index e73a7a9c5..bdd7b95f4 100644
--- a/crypto/x509v3/v3_utl.c
+++ b/crypto/x509v3/v3_utl.c
@@ -285,6 +285,10 @@ STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
     int state;
     /* We are going to modify the line so copy it first */
     linebuf = BUF_strdup(line);
+    if (linebuf == NULL) {
+        X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
     state = HDR_NAME;
     ntmp = NULL;
     /* Go through all characters */