diff --git a/backport-Fix-possible-overflows.patch b/backport-Fix-possible-overflows.patch
new file mode 100644
index 0000000000000000000000000000000000000000..7e5c81d708fb98aaff50ca5a24cc790febcad8f6
--- /dev/null
+++ b/backport-Fix-possible-overflows.patch
@@ -0,0 +1,37 @@
+From 425162fb7a9577f212d44c1b6f6e2ccc36acf131 Mon Sep 17 00:00:00 2001
+From: Thomas Habets <habets@google.com>
+Date: Fri, 1 Nov 2019 17:08:08 +0000
+Subject: [PATCH 1/1] Fix possible overflows
+
+---
+ src/libnet_port_list.c | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/src/libnet_port_list.c b/src/libnet_port_list.c
+index fff151e..942a856 100644
+--- a/src/libnet_port_list.c
++++ b/src/libnet_port_list.c
+@@ -250,16 +250,17 @@ libnet_plist_chain_dump_string(libnet_plist_t *plist)
+     {
+         if (plist->bport == plist->eport)
+         {
+-            i = snprintf(&buf[j], BUFSIZ, "%d", plist->bport);
++            i = snprintf(&buf[j], BUFSIZ-j, "%d", plist->bport);
+         }
+         else
+         {
+-            i = snprintf(&buf[j], BUFSIZ, "%d-%d", plist->bport, plist->eport);
++            i = snprintf(&buf[j], BUFSIZ-j, "%d-%d", plist->bport, plist->eport);
+         }
+         j += i;
+         if (plist->next)
+         {
+-            snprintf(&buf[j++], BUFSIZ, ",");
++            snprintf(&buf[j], BUFSIZ-j, ",");
++            j++;
+         }
+     }
+     return (strdup(buf));       /* XXX - reentrancy == no */
+-- 
+2.20.1
+
diff --git a/libnet.spec b/libnet.spec
index a811a4acffce3988cf96a151e23098d43739bf1b..9b5637aa8a77c8c9b5e965bd9683144886a30d3c 100644
--- a/libnet.spec
+++ b/libnet.spec
@@ -1,10 +1,11 @@
 Name:           libnet
 Version:        1.2
-Release:	1
+Release:        2
 Summary:        A C library to help with construction and handling of network packets
 License:        BSD
 URL:            https://github.com/libnet/libnet/
 Source:         https://github.com/libnet/libnet/releases/download/v%{version}/%{name}-%{version}.tar.gz
+Patch0:         backport-Fix-possible-overflows.patch
 BuildRequires:  automake autoconf libtool 
 
 %description
@@ -70,6 +71,9 @@ rm -f doc/html/Makefile*
 %doc %{_docdir}/*
 
 %changelog
+* Wed Dec 27 2023 lvgenggeng<lvgenggeng@uniontech.com> - 1.2-2
+- backport: fix possible overflows
+
 * Wed Aug 19 2020 yuboyun<yuboyun@huawei.com> - 1.2-1
 - Update to version 1.2