diff --git a/backport-CVE-2019-16707.patch b/backport-CVE-2019-16707.patch
new file mode 100644
index 0000000..649eef5
--- /dev/null
+++ b/backport-CVE-2019-16707.patch
@@ -0,0 +1,22 @@
+From ac938e2ecb48ab4dd21298126c7921689d60571b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
+Date: Tue, 12 Nov 2019 20:03:15 +0000
+Subject: [PATCH] invalid read memory access #624
+
+---
+ src/hunspell/suggestmgr.cxx | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/hunspell/suggestmgr.cxx b/src/hunspell/suggestmgr.cxx
+index dba084e9..c23f165a 100644
+--- a/src/hunspell/suggestmgr.cxx
++++ b/src/hunspell/suggestmgr.cxx
+@@ -2040,7 +2040,7 @@ int SuggestMgr::leftcommonsubstring(
+   int l2 = su2.size();
+   // decapitalize dictionary word
+   if (complexprefixes) {
+-    if (su1[l1 - 1] == su2[l2 - 1])
++    if (l1 && l2 && su1[l1 - 1] == su2[l2 - 1])
+       return 1;
+   } else {
+     unsigned short idx = su2.empty() ? 0 : (su2[0].h << 8) + su2[0].l;
diff --git a/hunspell.spec b/hunspell.spec
index 8ddf84b..d3851ef 100644
--- a/hunspell.spec
+++ b/hunspell.spec
@@ -1,9 +1,12 @@
 Name:           hunspell
 Summary:        A spell checker and morphological analyzer library
 Version:        1.7.0
-Release:        6
+Release:        7
 URL:            https://github.com/hunspell/hunspell
 Source:         https://github.com/hunspell/hunspell/archive/v%{version}.tar.gz
+
+Patch1:         backport-CVE-2019-16707.patch
+
 License:        LGPLv2+ or GPLv2+ or MPLv1.1
 BuildRequires:  gcc-c++ autoconf automake libtool ncurses-devel gettext
 BuildRequires:  perl-generators words hunspell hunspell-devel gdb
@@ -83,6 +86,9 @@ cp -a %{_libdir}/libhunspell-1.6.so* %{buildroot}%{_libdir}
 %lang(hu) %{_mandir}/hu/man1/hunspell.1.gz
 
 %changelog
+* Wed Jan 13 2021 jinzhimin <jinzhimin2@huawei.com> - 1.7.0-7
+- fix CVE-2019-16707
+
 * Tue Sep 08 2020 zhanzhimin <zhanzhimin@huawei.com> - 1.7.0-6
 - update source