diff --git a/backport-CVE-2020-18770.patch b/backport-CVE-2020-18770.patch
new file mode 100644
index 0000000000000000000000000000000000000000..96871037cf0c981bf79c1edbc7bcf7bb71fb093c
--- /dev/null
+++ b/backport-CVE-2020-18770.patch
@@ -0,0 +1,33 @@
+From 99462cac1c6581bce36fe17fd1f430cbe114f0af Mon Sep 17 00:00:00 2001
+From: Valentin Lefebvre <valentin.lefebvre@suse.com>
+Date: Wed, 20 Sep 2023 12:04:56 +0200
+Subject: [PATCH] mmappend.c: pre-check header trailer magic
+
+* Avoid potential ASAN:SIGSEGV invalid memory access by pre-check the header
+  trailer magic.
+* CVE-2020-18770
+
+Signed-off-by: Valentin Lefebvre <valentin.lefebvre@suse.com>
+
+---
+ zzip/mmapped.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/zzip/mmapped.c b/zzip/mmapped.c
+index 8af18f4..49990e6 100644
+--- a/zzip/mmapped.c
++++ b/zzip/mmapped.c
+@@ -269,7 +269,9 @@ zzip_disk_entry_to_file_header(ZZIP_DISK * disk, struct zzip_disk_entry *entry)
+         return 0;
+     }
+     ___  struct zzip_file_header *file_header = (void *) ptr;
+-    if (zzip_file_header_get_magic(file_header) != ZZIP_FILE_HEADER_MAGIC)
++    if (file_header != 'P' || /* quick pre-check for trailer magic */
++        zzip_file_header_get_magic(file_header) != ZZIP_FILE_HEADER_MAGIC)
++ 
+     {
+         errno = EBADMSG;
+         return 0;
+-- 
+2.40.1
+
diff --git a/zziplib.spec b/zziplib.spec
index e27e50f771ab15ed8e96c414ea27773882963bb5..0d6b9937a99d6620b0248d990e7efc5131e7f6da 100644
--- a/zziplib.spec
+++ b/zziplib.spec
@@ -4,7 +4,7 @@ sed -i 's|^runpath_var=LD_RUN_PATH|runpath_var=DIE_RPATH_DIE|g' */libtool
 
 Name:            zziplib
 Version:         0.13.69
-Release:         8
+Release:         9
 Summary:         Lightweight library for zip compression
 License:         LGPLv2+ or MPLv1.1
 URL:             http://zziplib.sourceforge.net
@@ -21,6 +21,7 @@ Patch6007:       backport-0004-CVE-2020-18442.patch
 Patch6008:       backport-0005-CVE-2020-18442.patch
 Patch6009:       backport-0006-CVE-2020-18442.patch
 Patch6010:       backport-0007-CVE-2020-18442.patch
+Patch6011:       backport-CVE-2020-18770.patch
 
 BuildRequires:   perl-interpreter python2 python2-rpm-macros zip xmlto
 BuildRequires:   zlib-devel SDL-devel pkgconfig autoconf automake gcc make
@@ -66,6 +67,7 @@ This package includes help documentation and manuals related to zziplib.
 %patch6008 -p1
 %patch6009 -p1
 %patch6010 -p1
+%patch6011 -p1
 
 find . -name '*.py' | xargs sed -i 's@#! /usr/bin/python@#! %__python2@g;s@#! /usr/bin/env python@#! %__python2@g'
 
@@ -101,6 +103,9 @@ export PYTHON=%__python2
 %{_mandir}/man3/*
 
 %changelog
+* Thu Sep 28 2023 licihua <licihua@huawei.com> - 0.13.36-9
+- fix CVE-2020-18770
+
 * Fri Jun 25 2021 shixuantong <shixuantong@huawei.com> - 0.13.36-8
 - fix CVE-2020-18442