!281 fix CVE-2025-32414, CVE-2025-32415

From: @fundawang 
Reviewed-by: @dillon_chen 
Signed-off-by: @dillon_chen

backport-CVE-2025-32414.patch

@@ -0,0 +1,73 @@
+From d7657811964eac1cb9743bb98649278ad948f0d2 Mon Sep 17 00:00:00 2001
+From: Maks Verver <maks@verver.ch>
+Date: Tue, 8 Apr 2025 13:13:55 +0200
+Subject: [PATCH] [CVE-2025-32414] python: Read at most len/4 characters.
+
+Fixes #889 by reserving space in the buffer for UTF-8 encoding of text.
+---
+ python/libxml.c | 28 ++++++++++++++++++----------
+ 1 file changed, 18 insertions(+), 10 deletions(-)
+
+diff --git a/python/libxml.c b/python/libxml.c
+index 1fe8d6850..2bf140786 100644
+--- a/python/libxml.c
++++ b/python/libxml.c
+@@ -266,7 +266,9 @@ xmlPythonFileReadRaw (void * context, char * buffer, int len) {
+ #endif
+     file = (PyObject *) context;
+     if (file == NULL) return(-1);
+-    ret = PyObject_CallMethod(file, (char *) "read", (char *) "(i)", len);
++    /* When read() returns a string, the length is in characters not bytes, so
++       request at most len / 4 characters to leave space for UTF-8 encoding. */
++    ret = PyObject_CallMethod(file, (char *) "read", (char *) "(i)", len / 4);
+     if (ret == NULL) {
+ 	printf("xmlPythonFileReadRaw: result is NULL\n");
+ 	return(-1);
+@@ -301,10 +303,12 @@ xmlPythonFileReadRaw (void * context, char * buffer, int len) {
+ 	Py_DECREF(ret);
+ 	return(-1);
+     }
+-    if (lenread > len)
+-	memcpy(buffer, data, len);
+-    else
+-	memcpy(buffer, data, lenread);
++    if (lenread < 0 || lenread > len) {
++	printf("xmlPythonFileReadRaw: invalid lenread\n");
++	Py_DECREF(ret);
++	return(-1);
++    }
++    memcpy(buffer, data, lenread);
+     Py_DECREF(ret);
+     return(lenread);
+ }
+@@ -331,7 +335,9 @@ xmlPythonFileRead (void * context, char * buffer, int len) {
+ #endif
+     file = (PyObject *) context;
+     if (file == NULL) return(-1);
+-    ret = PyObject_CallMethod(file, (char *) "io_read", (char *) "(i)", len);
++    /* When io_read() returns a string, the length is in characters not bytes, so
++       request at most len / 4 characters to leave space for UTF-8 encoding. */
++    ret = PyObject_CallMethod(file, (char *) "io_read", (char *) "(i)", len / 4);
+     if (ret == NULL) {
+ 	printf("xmlPythonFileRead: result is NULL\n");
+ 	return(-1);
+@@ -366,10 +372,12 @@ xmlPythonFileRead (void * context, char * buffer, int len) {
+ 	Py_DECREF(ret);
+ 	return(-1);
+     }
+-    if (lenread > len)
+-	memcpy(buffer, data, len);
+-    else
+-	memcpy(buffer, data, lenread);
++    if (lenread < 0 || lenread > len) {
++	printf("xmlPythonFileRead: invalid lenread\n");
++	Py_DECREF(ret);
++	return(-1);
++    }
++    memcpy(buffer, data, lenread);
+     Py_DECREF(ret);
+     return(lenread);
+ }
+-- 
+GitLab
+

backport-CVE-2025-32415.patch

@@ -0,0 +1,38 @@
+From 384cc7c182fc00c6d5e2ab4b5e3671b2e3f93c84 Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Sun, 6 Apr 2025 12:41:11 +0200
+Subject: [PATCH] [CVE-2025-32415] schemas: Fix heap buffer overflow in
+ xmlSchemaIDCFillNodeTables
+
+Don't use local variable which could contain a stale value.
+
+Fixes #890.
+---
+ xmlschemas.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/xmlschemas.c b/xmlschemas.c
+index e35c117ef..4bdabd129 100644
+--- a/xmlschemas.c
++++ b/xmlschemas.c
+@@ -23324,7 +23324,7 @@ xmlSchemaIDCFillNodeTables(xmlSchemaValidCtxtPtr vctxt,
+ 			j++;
+ 		    } while (j < nbDupls);
+ 		}
+-		if (nbNodeTable) {
++		if (bind->nbNodes) {
+ 		    j = 0;
+ 		    do {
+ 			if (nbFields == 1) {
+@@ -23375,7 +23375,7 @@ xmlSchemaIDCFillNodeTables(xmlSchemaValidCtxtPtr vctxt,
+ 
+ next_node_table_entry:
+ 			j++;
+-		    } while (j < nbNodeTable);
++		    } while (j < bind->nbNodes);
+ 		}
+ 		/*
+ 		* If everything is fine, then add the IDC target-node to
+-- 
+GitLab
+

libxml2.spec

@@ -1,7 +1,7 @@
 Summary: Library providing XML and HTML support
 Name: libxml2
 Version: 2.11.5
-Release: 5
+Release: 6
 License: MIT
 Group: Development/Libraries
 Source: https://download.gnome.org/sources/%{name}/2.11/%{name}-%{version}.tar.xz
@@ -16,6 +16,8 @@ Patch6: backport-CVE-2024-40896.patch
 Patch7: backport-CVE-2024-56171.patch
 Patch8: backport-CVE-2025-24928.patch
 Patch9: backport-CVE-2025-27113.patch
+Patch10: backport-CVE-2025-32414.patch
+Patch11: backport-CVE-2025-32415.patch
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-root
 BuildRequires: python3-devel
@@ -167,6 +169,13 @@ rm -fr %{buildroot}
 
 
 %changelog
+* Mon Apr 14 2025 Funda Wang <fundawang@yeah.net> - 2.11.5-6
+- Type:CVE
+- CVE:CVE-2025-32414
+- CVE:CVE-2025-32415
+- SUG:NA
+- DESC: fix CVE-2025-32414, CVE-2025-32415
+
 * Wed Feb 19 2025 Funda Wang <fundawang@yeah.net> - 2.11.5-5
 - Type:CVE
 - CVE:CVE-2024-56171