diff --git a/0004-IPA-server-mode-properly-initialize-ext_groups.patch b/0004-IPA-server-mode-properly-initialize-ext_groups.patch
new file mode 100644
index 0000000..ae43277
--- /dev/null
+++ b/0004-IPA-server-mode-properly-initialize-ext_groups.patch
@@ -0,0 +1,32 @@
+From 3d6fb8fcaa650d1da60a2e575847bd6fcfa08c72 Mon Sep 17 00:00:00 2001
+From: Sumit Bose <sbose@redhat.com>
+Date: Wed, 16 Oct 2013 10:45:52 +0200
+Subject: [PATCH] IPA server mode: properly initialize ext_groups
+
+---
+ src/providers/ipa/ipa_subdomains.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/providers/ipa/ipa_subdomains.c b/src/providers/ipa/ipa_subdomains.c
+index bfbdabf..ea55f70 100644
+--- a/src/providers/ipa/ipa_subdomains.c
++++ b/src/providers/ipa/ipa_subdomains.c
+@@ -1305,13 +1305,14 @@ int ipa_ad_subdom_init(struct be_ctx *be_ctx,
+         return EINVAL;
+     }
+ 
+-    id_ctx->server_mode = talloc(id_ctx, struct ipa_server_mode_ctx);
++    id_ctx->server_mode = talloc_zero(id_ctx, struct ipa_server_mode_ctx);
+     if (id_ctx->server_mode == NULL) {
+         return ENOMEM;
+     }
+     id_ctx->server_mode->realm = realm;
+     id_ctx->server_mode->hostname = hostname;
+     id_ctx->server_mode->trusts = NULL;
++    id_ctx->server_mode->ext_groups = NULL;
+ 
+     return EOK;
+ }
+-- 
+1.8.3.1
+
diff --git a/sssd.spec b/sssd.spec
index a5ce760..feafb40 100644
--- a/sssd.spec
+++ b/sssd.spec
@@ -8,7 +8,7 @@
 
 Name: sssd
 Version: 1.11.1
-Release: 3%{?dist}
+Release: 4%{?dist}
 Group: Applications/System
 Summary: System Security Services Daemon
 License: GPLv3+
@@ -20,6 +20,7 @@ BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
 Patch0001: 0001-krb5-Remove-ability-to-create-public-directories.patch
 Patch0002: 0002-krb5-Fix-unit-tests.patch
 Patch0003: 0003-AD-properly-intitialize-GC-from-ad_server-option.patch
+Patch0004: 0004-IPA-server-mode-properly-initialize-ext_groups.patch
 
 ### Dependencies ###
 Requires: sssd-common = %{version}-%{release}
@@ -707,6 +708,9 @@ fi
 %postun -n libsss_idmap -p /sbin/ldconfig
 
 %changelog
+* Wed Oct 16 2013 Sumit Bose <sbose@redhat.com> - 1.11.1-4
+- Fix potential crash with external groups in trusted IPA-AD setup
+
 * Tue Oct 08 2013 Jakub Hrozek <jhrozek@redhat.com> - 1.11.1-3
 - Fix failover from Global Catalog to LDAP in case GC is not available