Fix CVE-2022-49043 (RHEL-76289)

Resolves: RHEL-76289

libxml2-2.9.13-CVE-2022-49043.patch

@@ -0,0 +1,34 @@
+From 6bb146a3ea24a9bacfad6fe67268f0404af37d9c Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Wed, 2 Nov 2022 16:13:27 +0100
+Subject: [PATCH] malloc-fail: Fix use-after-free in xmlXIncludeAddNode
+
+Found with libFuzzer, see #344.
+---
+ xinclude.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/xinclude.c b/xinclude.c
+index 2a0614d7..e32b3419 100644
+--- a/xinclude.c
++++ b/xinclude.c
+@@ -614,14 +614,15 @@ xmlXIncludeAddNode(xmlXIncludeCtxtPtr ctxt, xmlNodePtr cur) {
+     }
+     URL = xmlSaveUri(uri);
+     xmlFreeURI(uri);
+-    xmlFree(URI);
+     if (URL == NULL) {
+ 	xmlXIncludeErr(ctxt, cur, XML_XINCLUDE_HREF_URI,
+ 	               "invalid value URI %s\n", URI);
+ 	if (fragment != NULL)
+ 	    xmlFree(fragment);
++        xmlFree(URI);
+ 	return(-1);
+     }
++    xmlFree(URI);
+ 
+     /*
+      * If local and xml then we need a fragment
+-- 
+2.48.1
+

libxml2.spec

@@ -7,7 +7,7 @@
 
 Name:           libxml2
 Version:        2.9.7
-Release:        18%{?dist}.1
+Release:        18%{?dist}.2
 Summary:        Library providing XML and HTML support
 
 License:        MIT
@@ -64,6 +64,8 @@ Patch23:         libxml2-2.9.7-CVE-2023-29469.patch
 Patch24:         libxml2-2.11.0-fix-CVE-2023-39615.patch
 # https://issues.redhat.com/browse/RHEL-31056
 Patch25:         libxml2-2.9.7-CVE-2024-25062.patch
+# https://issues.redhat.com/browse/RHEL-76289
+Patch26:         libxml2-2.9.13-CVE-2022-49043.patch
 
 BuildRequires:  gcc
 BuildRequires:  cmake-rpm-macros
@@ -235,6 +237,9 @@ gzip -9 -c doc/libxml2-api.xml > doc/libxml2-api.xml.gz
 %{python3_sitearch}/libxml2mod.so
 
 %changelog
+* Tue Feb 11 2025 David King <dking@redhat.com> - 2.9.7.18.2
+- Fix CVE-2022-49043 (RHEL-76289)
+
 * Mon Apr 29 2024 David King <amigadave@amigadave.com> - 2.9.7-18.1
 - Fix CVE-2024-25062 (RHEL-31056)