diff --git a/tasks/section_5/cis_5.6.x.yml b/tasks/section_5/cis_5.6.x.yml
index e5565b4..a2c0219 100644
--- a/tasks/section_5/cis_5.6.x.yml
+++ b/tasks/section_5/cis_5.6.x.yml
@@ -98,6 +98,11 @@
             regexp: '^USERGROUPS_ENAB'
             line: USERGROUPS_ENAB no
 
+      - name: "5.6.5 | PATCH | Ensure default user umask is 027 or more restrictive | Force umask sessions /etc/pam.d/system-auth"
+        ansible.builtin.lineinfile:
+            path: /etc/pam.d/system-auth
+            line: 'session     required            pam_umask.so'
+            insertafter: EOF
   when:
       - rhel9cis_rule_5_6_5
   tags: