diff --git a/backport-Do-not-assume-PATH_MAX-is-defined.patch b/backport-Do-not-assume-PATH_MAX-is-defined.patch
new file mode 100644
index 0000000000000000000000000000000000000000..c876b20f7204f749a7560a9ba1ee668d8f51419d
--- /dev/null
+++ b/backport-Do-not-assume-PATH_MAX-is-defined.patch
@@ -0,0 +1,41 @@
+From eea6fbc196872eeca6f02fcfba298f3e1bb62880 Mon Sep 17 00:00:00 2001
+From: Guillem Jover <guillem@hadrons.org>
+Date: Thu, 11 Jan 2024 02:18:07 +0100
+Subject: [PATCH] Do not assume PATH_MAX is defined
+
+---
+ filename.c | 15 +++++++++++++++
+ 1 file changed, 15 insertions(+)
+
+diff --git a/filename.c b/filename.c
+index eb6b16c..820d107 100644
+--- a/filename.c
++++ b/filename.c
+@@ -830,9 +830,24 @@ lrealpath(path)
+ 	char *path;
+ {
+ #if HAVE_REALPATH
++		/*
++		 * Not all systems support the POSIX.1-2008 realpath() behavior
++		 * of allocating when passing a NULL argument. And PATH_MAX is
++		 * not required to be defined, or might contain an exceedingly
++		 * big value. We assume that if it is not defined (such as on
++		 * GNU/Hurd), then realpath() accepts NULL.
++		 */
++#ifndef PATH_MAX
++		char *rpath;
++
++		rpath = realpath(path, NULL);
++		if (rpath != NULL)
++			return (rpath);
++#else	
+ 	char rpath[PATH_MAX];
+ 	if (realpath(path, rpath) != NULL)
+ 		return (save(rpath));
++#endif	
+ #endif
+ 	return (save(path));
+ }
+-- 
+2.27.0
+
diff --git a/less.spec b/less.spec
index 56e9bae8b5f19eb9de256a5af54ee1958f5a722a..5a8799c36c7679593f477529c7dbad74b2006f65 100644
--- a/less.spec
+++ b/less.spec
@@ -1,6 +1,6 @@
 Name:		less
 Version:	590
-Release:        4
+Release:        5
 Summary:	Less is a pager that displays text files.
 License:	GPLv3+ or BSD
 URL:		http://www.greenwoodsoftware.com/less
@@ -12,6 +12,7 @@ Patch3:		backport-Shell-quote-filenames-when-invoking-LESSCLOSE.patch
 Patch4:         backport-Some-constifying.patch
 Patch5:         backport-Implement-osc8_open.patch
 Patch6:         backport-CVE-2024-32487.patch
+Patch7:         backport-Do-not-assume-PATH_MAX-is-defined.patch
 
 BuildRequires:	git gcc make ncurses-devel autoconf automake libtool
 
@@ -50,6 +51,9 @@ autoreconf -ivf
 %{_mandir}/man1/*
 
 %changelog
+* Fri Jun 21 2024 baiguo <baiguo@kylinos.cn> - 590-5
+- Do not assume PATH_MAX is defined
+
 * Mon Apr 22 2024 wangjiang <wangjiang37@h-partners.com> - 590-4
 - fix CVE-2024-32487