From ea338a6ddc9b9e2699d4d15990832549156a92c0 Mon Sep 17 00:00:00 2001
From: Michael Mann <mmann78@netscape.net>
Date: Sat, 21 Jun 2025 12:11:30 -0400
Subject: [PATCH] Schematron: Fix null pointer dereference leading to DoS

(CVE-2025-49795)

Fixes #932
---
 schematron.c | 2 ++
 1 file changed, 2 insertions(+)

Index: libxml2-2.11.6/schematron.c
===================================================================
--- libxml2-2.11.6.orig/schematron.c
+++ libxml2-2.11.6/schematron.c
@@ -1487,6 +1487,8 @@ xmlSchematronFormatReport(xmlSchematronV
             select = xmlGetNoNsProp(child, BAD_CAST "select");
             comp = xmlXPathCtxtCompile(ctxt->xctxt, select);
             eval = xmlXPathCompiledEval(comp, ctxt->xctxt);
+            if (eval == NULL)
+                return ret;
 
             switch (eval->type) {
             case XPATH_NODESET: {