diff --git a/SOURCES/glibc-rh1979127.patch b/SOURCES/glibc-rh1979127.patch
new file mode 100644
index 0000000..4a21d5a
--- /dev/null
+++ b/SOURCES/glibc-rh1979127.patch
@@ -0,0 +1,33 @@
+commit 5adda61f62b77384718b4c0d8336ade8f2b4b35c
+Author: Andreas Schwab <schwab@linux-m68k.org>
+Date:   Fri Jun 25 15:02:47 2021 +0200
+
+    wordexp: handle overflow in positional parameter number (bug 28011)
+    
+    Use strtoul instead of atoi so that overflow can be detected.
+
+diff --git a/posix/wordexp-test.c b/posix/wordexp-test.c
+index cc29840355e047cc..30c1dd65efcc0b49 100644
+--- a/posix/wordexp-test.c
++++ b/posix/wordexp-test.c
+@@ -200,6 +200,7 @@ 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 048a8068544c81fa..4061969c720f1f34 100644
+--- a/posix/wordexp.c
++++ b/posix/wordexp.c
+@@ -1420,7 +1420,7 @@ 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. */
diff --git a/SPECS/glibc.spec b/SPECS/glibc.spec
index 6794e06..2aa98e9 100644
--- a/SPECS/glibc.spec
+++ b/SPECS/glibc.spec
@@ -1,6 +1,6 @@
 %define glibcsrcdir glibc-2.28
 %define glibcversion 2.28
-%define glibcrelease 161%{?dist}
+%define glibcrelease 162%{?dist}
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
 #
@@ -714,6 +714,7 @@ Patch577: glibc-rh1956357-5.patch
 Patch578: glibc-rh1956357-6.patch
 Patch579: glibc-rh1956357-7.patch
 Patch580: glibc-rh1956357-8.patch
+Patch581: glibc-rh1979127.patch
 
 ##############################################################################
 # Continued list of core "glibc" package information:
@@ -2626,6 +2627,10 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Thu Jul  8 2021 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.28-162
+- CVE-2021-35942: wordexp: handle overflow in positional parameter number
+  (#1979127)
+
 * Fri Jun 18 2021 Carlos O'Donell <carlos@redhat.com> - 2.28-161
 - Improve POWER10 performance with POWER9 fallbacks (#1956357)