I want to emphasize this is only an issue if an attacker manages to gain login access to your system. Although I totally agree this vulnerability should be given a high priority & fixed by applying the appropriate patches, it would be more concerning to learn login access to my systems were possible that are a prerequisite for the "stack-clash" exploit to be performed.

Additionally it may take a few days for your distro to provide the patch for your OS version. 

Let this be a wakeup call to those of you who haven't secured your systems by A) denying root ssh access and B) allowing only public key logins. Those of course are only 2 of the many other precautions all node operators should have in place. Make sure all unessential network listeners are disabled, and you use fail2ban on any open ports. 

I also highly recommend you employ the api_access control for your cli_wallet, and only expose the rpc-endpoint to the network through a proxy or not at all externally.