diff --git a/images/ubuntu/scripts/build/configure-environment.sh b/images/ubuntu/scripts/build/configure-environment.sh
index 7ffbe60d..5e378157 100644
--- a/images/ubuntu/scripts/build/configure-environment.sh
+++ b/images/ubuntu/scripts/build/configure-environment.sh
@@ -41,6 +41,9 @@ echo 'vm.max_map_count=262144' | tee -a /etc/sysctl.conf
 echo 'fs.inotify.max_user_watches=655360' | tee -a /etc/sysctl.conf
 echo 'fs.inotify.max_user_instances=1280' | tee -a /etc/sysctl.conf
 
+# https://github.com/actions/runner-images/issues/9491
+echo 'vm.mmap_rnd_bits=28' | tee -a /etc/sysctl.conf
+
 # https://github.com/actions/runner-images/pull/7860
 netfilter_rule='/etc/udev/rules.d/50-netfilter.rules'
 rules_directory="$(dirname "${netfilter_rule}")"