A few days ago, a Google engineer discovered a new critical bug in the glibc library.
The bug was discovered in the domain look-up code for glibc.
The bug could potentially allow hackers to maliciously implant code within a device’s memory, allowing remote execution of code.
However, Google said it is very hard to exploit the bug although their engineers have worked out how. We do advice to update your systems as fast as possible!

Read more about the bug here