As per the recent post on the Qualys security blog post, there is a vulnerability impacting a large number of Linux distributions that allows local privilege escalations. This vulnerability is in the pkexec program, which will be installed by default on many Linux distributions.

We advise you update Linux on all computer and devices, at home and at work, (campus and personal) that connect to a network as soon as possible.

For information on how to update your Linux distribution, see your vendor’s website.