diff --git a/SPECS/libX11.spec b/SPECS/libX11.spec
index 2bf1f9c..6e27686 100644
--- a/SPECS/libX11.spec
+++ b/SPECS/libX11.spec
@@ -5,7 +5,7 @@
 Summary: Core X11 protocol client library
 Name: libX11
 Version: 1.6.8
-Release: 3%{?gitdate:.%{gitdate}git%{gitversion}}%{?dist}
+Release: 4%{?gitdate:.%{gitdate}git%{gitversion}}%{?dist}
 License: MIT
 Group: System Environment/Libraries
 URL: http://www.x.org
@@ -22,6 +22,9 @@ Patch2: dont-forward-keycode-0.patch
 Patch3: 0001-Fix-XTS-regression-in-XCopyColormapAndFree.patch
 Patch4: 0001-Fix-poll_for_response-race-condition.patch
 
+# CVE-2020-14363
+Patch5: 0001-Fix-an-integer-overflow-in-init_om.patch
+
 BuildRequires: xorg-x11-util-macros >= 1.11
 BuildRequires: pkgconfig(xproto) >= 7.0.15
 BuildRequires: xorg-x11-xtrans-devel >= 1.0.3-4
@@ -64,6 +67,7 @@ libX11/libxcb interoperability library
 %patch2 -p1 -b .dont-forward-keycode-0
 %patch3 -p1 -b .copycolormapandfree
 %patch4 -p1 -b .race
+%patch5 -p1 -b .fix-an-integer-overflow-in-init_om
 
 %build
 autoreconf -v --install --force
@@ -128,6 +132,9 @@ make %{?_smp_mflags} check
 %{_mandir}/man5/*.5*
 
 %changelog
+* Tue Nov  3 2020 Michel Dänzer <mdaenzer@redhat.com> - 1.6.8-4
+- Fix CVE-2020-14363 (#1873923)
+
 * Mon Feb 24 2020 Adam Jackson <ajax@redhat.com> - 1.6.8-3
 - Fix race condition in poll_for_reponse