From 98194640b80a8d04b5af22b077ffd8368a9568cf Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Thu, 4 Sep 2025 21:13:24 +0200
Subject: [PATCH] Fix memory leak of prefix in xmlTextWriterStartElementNS()

---
 xmlwriter.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xmlwriter.c b/xmlwriter.c
index 07d900f9e..557432f2a 100644
--- a/xmlwriter.c
+++ b/xmlwriter.c
@@ -1051,6 +1051,7 @@ xmlTextWriterStartElementNS(xmlTextWriter *writer,
         if (p->uri == 0) {
             xmlWriterErrMsg(writer, XML_ERR_NO_MEMORY,
                             "xmlTextWriterStartElementNS : out of memory!\n");
+            xmlFree(p->prefix);
             xmlFree(p);
             return -1;
         }