A LuaJIT security update has been released for Ubuntu Linux 16.04 LTS.

USN-4501-1: LuaJIT vulnerability

==========================================================================
Ubuntu Security Notice USN-4501-1
September 15, 2020

luajit vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

LuaJIT could be made crash or expose sensitive information if it received
specially crafted input.

Software Description:
- luajit: Just in time compiler for Lua programming language version 5.1

Details:

It was discovered that an out-of-bounds read existed in LuaJIT. An
attacker could use this to cause a denial of service (application crash)
or possibly expose sensitive information. (CVE-2020-15890)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
libluajit-5.1-2 2.0.4+dfsg-1+deb9u1build0.16.04.1
libluajit-5.1-common 2.0.4+dfsg-1+deb9u1build0.16.04.1
libluajit-5.1-dev 2.0.4+dfsg-1+deb9u1build0.16.04.1
luajit 2.0.4+dfsg-1+deb9u1build0.16.04.1

In general, a standard system update will make all the necessary changes.

References:
  https://usn.ubuntu.com/4501-1
CVE-2020-15890

Package Information:

  https://launchpad.net/ubuntu/+source/luajit/2.0.4+dfsg-1+deb9u1build0.16.04.1