diff --git a/GDBusConnection-does-not-handle-serial-number-overflow.patch b/GDBusConnection-does-not-handle-serial-number-overflow.patch
new file mode 100644
index 0000000000000000000000000000000000000000..bec8635c8749958a5b96ac5309b3859d994b48aa
--- /dev/null
+++ b/GDBusConnection-does-not-handle-serial-number-overflow.patch
@@ -0,0 +1,41 @@
+From 6fb5fdaca0938b50f7b19a6cab19df9af3d2b4c1 Mon Sep 17 00:00:00 2001
+From: zhuhongbo <zhuhongbo@uniontech.com>
+Date: Thu, 11 Dec 2025 13:13:05 +0800
+Subject: [PATCH] gdbusconnection: Prevent sending a serial of zero on overflow
+
+---
+ gio/gdbusconnection.c | 17 +++++++++++++++--
+ 1 file changed, 15 insertions(+), 2 deletions(-)
+
+diff --git a/gio/gdbusconnection.c b/gio/gdbusconnection.c
+index b4cdc7e..45d7861 100644
+--- a/gio/gdbusconnection.c
++++ b/gio/gdbusconnection.c
+@@ -1790,9 +1790,22 @@ g_dbus_connection_send_message_unlocked (GDBusConnection   *connection,
+     goto out;
+ 
+   if (flags & G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL)
+-    serial_to_use = g_dbus_message_get_serial (message);
++    {
++      serial_to_use = g_dbus_message_get_serial (message);
++    }
+   else
+-    serial_to_use = ++connection->last_serial; /* TODO: handle overflow */
++    {
++      /* The serial_to_use must not be zero, as per
++       * https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages. */
++      if (connection->last_serial == G_MAXUINT32)
++        connection->last_serial = 1;
++      else
++        connection->last_serial++;
++
++      serial_to_use = connection->last_serial;
++    }
++
++  g_assert (serial_to_use != 0);
+ 
+   switch (blob[0])
+     {
+-- 
+2.47.3
+
diff --git a/glib2.spec b/glib2.spec
index f974283aed7d20ca5620d59b88ad93338b09c9be..9a8f0b54db90acf06fc0b820a367069b82570986 100644
--- a/glib2.spec
+++ b/glib2.spec
@@ -2,7 +2,7 @@
 
 Name: glib2
 Version: 2.56.1
-Release: 9%{?dist}
+Release: 10%{?dist}
 Summary: A library of handy utility functions
 
 License: LGPLv2+
@@ -50,6 +50,7 @@ Patch40: 0001-gsignal-Plug-g_signal_connect_object-leak.patch
 # https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1927
 # https://gitlab.gnome.org/GNOME/glib/-/merge_requests/2000
 Patch50: CVE-2021-27219.patch
+Patch51: GDBusConnection-does-not-handle-serial-number-overflow.patch 
 
 # for GIO content-type support
 Requires: shared-mime-info
@@ -242,6 +243,9 @@ gio-querymodules-%{__isa_bits} %{_libdir}/gio/modules
 %{_datadir}/installed-tests
 
 %changelog
+* Thu Dec 11 2025 zhuhongbo <zhuhongbo@uniontech.com> - 2.56.1-10
+- gdbusconnection: Prevent sending a serial of zero on overflow
+
 * Mon May 24 2021 Michael Catanzaro <mcatanzaro@redhat.com> - 2.56.1-9
 - Fix CVE-2021-27219
   Resolves: #1960596