diff --git a/CVE-2019-18397.patch b/CVE-2019-18397.patch
new file mode 100644
index 0000000000000000000000000000000000000000..157eb18211a4de64f889e7bcd2c1d3dd5a540744
--- /dev/null
+++ b/CVE-2019-18397.patch
@@ -0,0 +1,25 @@
+From 034c6e9a1d296286305f4cfd1e0072b879f52568 Mon Sep 17 00:00:00 2001
+From: Dov Grobgeld <dov.grobgeld@gmail.com>
+Date: Thu, 24 Oct 2019 09:37:29 +0300
+Subject: [PATCH] Truncate isolate_level to FRIBIDI_BIDI_MAX_EXPLICIT_LEVEL
+
+---
+ lib/fribidi-bidi.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/lib/fribidi-bidi.c b/lib/fribidi-bidi.c
+index 6c84392..d384878 100644
+--- a/lib/fribidi-bidi.c
++++ b/lib/fribidi-bidi.c
+@@ -747,7 +747,9 @@ fribidi_get_par_embedding_levels_ex (
+             }
+ 
+ 	  RL_LEVEL (pp) = level;
+-          RL_ISOLATE_LEVEL (pp) = isolate_level++;
++          RL_ISOLATE_LEVEL (pp) = isolate_level;
++          if (isolate_level < FRIBIDI_BIDI_MAX_EXPLICIT_LEVEL-1)
++              isolate_level++;
+           base_level_per_iso_level[isolate_level] = new_level;
+ 
+ 	  if (!FRIBIDI_IS_NEUTRAL (override))
+
diff --git a/fribidi.spec b/fribidi.spec
index 72ff2694fa2c30fe010cb421498c03b2e82974ca..cbb57ef7586f7908f184a8fd420326aba1a77b76 100644
--- a/fribidi.spec
+++ b/fribidi.spec
@@ -1,12 +1,13 @@
 Name:           fribidi
 Version:        1.0.5
-Release:        3
+Release:        4
 Summary:        Library implementing the Unicode Bidirectional Algorithm
 License:        LGPLv2+ and UCD
 URL:            https://github.com/fribidi/fribidi/
 Source:         https://github.com/%{name}/%{name}/releases/download/v%{version}/%{name}-%{version}.tar.bz2
 
 BuildRequires:  gcc automake autoconf libtool
+Patch6000:      CVE-2019-18397.patch
 
 %description
 A library to handle bidirectional scripts (for example Hebrew, Arabic),
@@ -53,6 +54,9 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 %{_mandir}/man3/*.gz
 
 %changelog
+* Sun Jan 12 2020 zhangrui <zhangrui182@huawei.com> - 1.0.5-4
+- fix CVE-2019-18397
+
 * Fri Jan 10 2020 zhangrui <zhangrui182@huawei.com> - 1.0.5-3
 - Remove unnecessary patch