Wolfram Alpha has very recently discovered a potential security vulnerability in Mathematica 11.1, 11.2 and 11.3 on Linux operating systems.
Under certain circumstances, users of your system could execute arbitrary Wolfram Language code as root.
More details can be found here.
Updated Linux installers for Mathematica 11.2 and 11.3 are now available on the Uconn Software Website:
https://software.uconn.edu/software/mathematica/
If you need access to the Linux installer for Mathematica 11.1 please contact the Technology Support Center by sending an email to help@uconn.edu