diff --git a/backport-CVE-2021-35942-wordexp-handle-overflow-in-positional-parameter-numb.patch b/backport-CVE-2021-35942-wordexp-handle-overflow-in-positional-parameter-numb.patch
new file mode 100644
index 0000000000000000000000000000000000000000..1c5cb79ebf77a8164e9a84102df39d11368be7e5
--- /dev/null
+++ b/backport-CVE-2021-35942-wordexp-handle-overflow-in-positional-parameter-numb.patch
@@ -0,0 +1,43 @@
+From 5adda61f62b77384718b4c0d8336ade8f2b4b35c Mon Sep 17 00:00:00 2001
+From: Andreas Schwab <schwab@linux-m68k.org>
+Date: Fri, 25 Jun 2021 15:02:47 +0200
+Subject: [PATCH] wordexp: handle overflow in positional parameter number (bug
+ 28011)
+
+Use strtoul instead of atoi so that overflow can be detected.
+
+Conflict:NA
+Reference:https://sourceware.org/git/?p=glibc.git;a=commitdiff_plain;h=5adda61f62b77384718b4c0d8336ade8f2b4b35c
+---
+ posix/wordexp-test.c | 1 +
+ posix/wordexp.c      | 2 +-
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/posix/wordexp-test.c b/posix/wordexp-test.c
+index f93a546d7e..9df02dbbb3 100644
+--- a/posix/wordexp-test.c
++++ b/posix/wordexp-test.c
+@@ -183,6 +183,7 @@ struct test_case_struct
+     { 0, NULL, "$var", 0, 0, { NULL, }, IFS },
+     { 0, NULL, "\"\\n\"", 0, 1, { "\\n", }, IFS },
+     { 0, NULL, "", 0, 0, { NULL, }, IFS },
++    { 0, NULL, "${1234567890123456789012}", 0, 0, { NULL, }, IFS },
+ 
+     /* Flags not already covered (testit() has special handling for these) */
+     { 0, NULL, "one two", WRDE_DOOFFS, 2, { "one", "two", }, IFS },
+diff --git a/posix/wordexp.c b/posix/wordexp.c
+index bcbe96e48d..1f3b09f721 100644
+--- a/posix/wordexp.c
++++ b/posix/wordexp.c
+@@ -1399,7 +1399,7 @@ envsubst:
+   /* Is it a numeric parameter? */
+   else if (isdigit (env[0]))
+     {
+-      int n = atoi (env);
++      unsigned long n = strtoul (env, NULL, 10);
+ 
+       if (n >= __libc_argc)
+ 	/* Substitute NULL. */
+-- 
+2.27.0
+
diff --git a/glibc.spec b/glibc.spec
index 5d639ff8e8e074361f48a4d974b45b42bc35f7c9..a7b42219b4db4e0bd4a3e7ed4f9d97d8ac220300 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -59,7 +59,7 @@
 ##############################################################################
 Name: 	 	glibc
 Version: 	2.28
-Release: 	71
+Release: 	72
 Summary: 	The GNU libc libraries
 License:	%{all_license}
 URL: 		http://www.gnu.org/software/glibc/
@@ -129,6 +129,7 @@ Patch45: backport-CVE-2021-33574-0002-Fix-mq_notify-bug-27896.patch
 Patch46: backport-aarch64-align-stack-in-clone-BZ-27939.patch
 Patch47: backport-x86-64-Align-child-stack-to-16-bytes-BZ-27902.patch 
 Patch48: backport-ldconfig-handle-.dynstr-located-in-separate-segment-.patch
+Patch49: backport-CVE-2021-35942-wordexp-handle-overflow-in-positional-parameter-numb.patch
 
 Provides: ldconfig rtld(GNU_HASH) bundled(gnulib)
 
@@ -1153,6 +1154,10 @@ fi
 %doc hesiod/README.hesiod
 
 %changelog
+* Thu Jul 1 2021 QingqingLi<liqingqing3@huawei.com> - 2.28-72
+- wordexp: Use strtoul instead of atoi so that overflow can be detected. (bug 28011)
+  https://sourceware.org/bugzilla/show_bug.cgi?id=28011
+
 * Wed Jun 30 2021 lvying<lvying6@huawei.com> - 2.28-71
 - ldconfig: handle .dynstr located in separate segment (bug 25087)
   https://sourceware.org/git/?p=glibc.git;a=commit;h=58e8f5fd2ba47b6dc47fd4d0a35e4175c7c87aaa