diff --git a/CVE-2020-17507.patch b/CVE-2020-17507.patch
new file mode 100644
index 0000000000000000000000000000000000000000..5534134a8b712019a6f1a45a354bbef461ec6f67
--- /dev/null
+++ b/CVE-2020-17507.patch
@@ -0,0 +1,27 @@
+From 1a27a6cefbb457f2fb74159267835aaefb7c992d Mon Sep 17 00:00:00 2001
+From: kang_xiao_qiang <kangshaoqiang1@huawei.com>
+Date: Sun, 20 Sep 2020 15:35:21 +0800
+Subject: [PATCH] 2
+
+---
+ src/gui/image/qxbmhandler.cpp | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/gui/image/qxbmhandler.cpp b/src/gui/image/qxbmhandler.cpp
+index 414e8233..7483b245 100644
+--- a/src/gui/image/qxbmhandler.cpp
++++ b/src/gui/image/qxbmhandler.cpp
+@@ -154,7 +154,9 @@ static bool read_xbm_body(QIODevice *device, int w, int h, QImage *outImage)
+     w = (w+7)/8;                                // byte width
+ 
+     while (y < h) {                                // for all encoded bytes...
+-        if (p) {                                // p = "0x.."
++        if (p && p < (buf + readBytes - 3)) {                                // p = "0x.."
++	    if (!isxdigit(p[2]) || !isxdigit(p[3]))
++		return false;
+             *b++ = hex2byte(p+2);
+             p += 2;
+             if (++x == w && ++y < h) {
+-- 
+2.23.0
+
diff --git a/qt.spec b/qt.spec
index 54074171f040620e850b637a1f21df1a36bd2521..87bafd7d9713b2ffb79e4cf5517c7d812a6d3007 100644
--- a/qt.spec
+++ b/qt.spec
@@ -13,7 +13,7 @@
 Name:           qt
 Epoch:          1
 Version:        4.8.7
-Release:        49
+Release:        50
 Summary:        A software toolkit for developing applications
 License:        (LGPLv2 with exceptions or GPLv3 with exceptions) and ASL 2.0 and BSD and FTL and MIT
 URL:            http://qt-project.org/
@@ -78,6 +78,7 @@ Patch6001:      CVE-2018-19872.patch
 Patch6002:      CVE-2018-19871.patch
 Patch6003:      CVE-2018-19870.patch
 Patch6004:      CVE-2018-19873.patch
+Patch45:      CVE-2020-17507.patch
 
 BuildRequires:  cups-devel desktop-file-utils gcc-c++ libjpeg-devel findutils libmng-devel libtiff-devel pkgconfig pkgconfig(alsa)
 BuildRequires:  pkgconfig(dbus-1) pkgconfig(fontconfig) pkgconfig(glib-2.0) pkgconfig(icu-i18n) openssl-devel pkgconfig(libpng)
@@ -444,6 +445,9 @@ fi
 %{_qt4_prefix}/examples/
 
 %changelog
+* Sun Sep 20 2020 shaoqiang kang <kangshaoqiang1@huawei.com> - 1:4.8.7-50
+- fix CVE-2020-17507
+
 * Tue Sep 2020 shaoqiang kang <kangshaoqiang1@huawei.com> - 1:4.8.7-49
 - Modify source