diff --git a/shadow-4.8.1-commonio-force-lock-file-sync.patch b/shadow-4.8.1-commonio-force-lock-file-sync.patch
new file mode 100644
index 0000000..5ca7b53
--- /dev/null
+++ b/shadow-4.8.1-commonio-force-lock-file-sync.patch
@@ -0,0 +1,39 @@
+From fb0f702cbf958a5ee9097c1611212c9880b347ce Mon Sep 17 00:00:00 2001
+From: ikerexxe <ipedrosa@redhat.com>
+Date: Mon, 2 Nov 2020 17:08:55 +0100
+Subject: [PATCH] commonio: force lock file sync
+
+lib/commonio.c: after writing to the lock file, force a file sync to
+the storage system.
+
+Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1862056
+---
+ lib/commonio.c | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/lib/commonio.c b/lib/commonio.c
+index 16fa7e75..c5b3d104 100644
+--- a/lib/commonio.c
++++ b/lib/commonio.c
+@@ -157,7 +157,17 @@ static int do_lock_file (const char *file, const char *lock, bool log)
+ 	if (write (fd, buf, (size_t) len) != len) {
+ 		if (log) {
+ 			(void) fprintf (stderr,
+-			                "%s: %s: %s\n",
++			                "%s: %s file write error: %s\n",
++			                Prog, file, strerror (errno));
++		}
++		(void) close (fd);
++		unlink (file);
++		return 0;
++	}
++	if (fdatasync (fd) == -1) {
++		if (log) {
++			(void) fprintf (stderr,
++			                "%s: %s file sync error: %s\n",
+ 			                Prog, file, strerror (errno));
+ 		}
+ 		(void) close (fd);
+-- 
+2.26.2
+
diff --git a/shadow-utils.spec b/shadow-utils.spec
index 3367171..9c45824 100644
--- a/shadow-utils.spec
+++ b/shadow-utils.spec
@@ -1,7 +1,7 @@
 Summary: Utilities for managing accounts and shadow password files
 Name: shadow-utils
 Version: 4.8.1
-Release: 5%{?dist}
+Release: 6%{?dist}
 Epoch: 2
 URL: http://pkg-shadow.alioth.debian.org/
 Source0: https://github.com/shadow-maint/shadow/releases/download/%{version}/shadow-%{version}.tar.xz
@@ -53,8 +53,11 @@ Patch40: shadow-4.8-ignore-login-prompt.patch
 Patch42: shadow-4.8-useradd-selinux-mail.patch
 # Clarify useradd man regarding "-d" parameter - already upstreamed
 Patch43: shadow-4.8.1-useradd-man-clarification.patch
-# Upstreamed
+# https://github.com/shadow-maint/shadow/commit/140510de9de4771feb3af1d859c09604043a4c9b
+# https://github.com/shadow-maint/shadow/commit/8762f465d487a52bf68f9c0b7c3c1eb3caea7bc9
 Patch44: shadow-4.8.1-check-local-groups.patch
+# https://github.com/shadow-maint/shadow/commit/599cc003daf833bffdc9cbe0d33dc8b3e7ec74c8
+Patch45: shadow-4.8.1-commonio-force-lock-file-sync.patch
 
 License: BSD and GPLv2+
 BuildRequires: gcc
@@ -106,6 +109,7 @@ are used for managing group accounts.
 %patch42 -p1 -b .useradd-selinux-mail
 %patch43 -p1 -b .useradd-man-clarification
 %patch44 -p1 -b .check-local-groups
+%patch45 -p1 -b .commonio-force-lock-file-sync
 
 iconv -f ISO88591 -t utf-8  doc/HOWTO > doc/HOWTO.utf8
 cp -f doc/HOWTO.utf8 doc/HOWTO
@@ -261,6 +265,9 @@ done
 %{_mandir}/man8/vigr.8*
 
 %changelog
+* Mon Nov  9 2020 Iker Pedrosa <ipedrosa@redhat.com> - 2:4.8.1-6
+- commonio: force lock file sync (#1862056)
+
 * Tue Nov  3 2020 Petr Lautrbach <plautrba@redhat.com> - 2:4.8.1-5
 - Rebuild with libsemanage.so.2