This update for xonotic fixes the following issues:

Update to version 0.8.6

SECURITY ALERT: A bug was discovered in versions older than 0.8.6
that is believed to be exploitable by malicious server admins to
crash clients or, if they defeat mitigations, execute arbitrary code.
(boo#1212632)

update to 0.8.5:

* https://xonotic.org/posts/2022/xonotic-0-8-5-release/