A JACK security update has been released for Ubuntu Linux 16.04 ESM.

USN-5656-1: JACK vulnerability

==========================================================================
Ubuntu Security Notice USN-5656-1
October 04, 2022

jackd2 vulnerability
==========================================================================

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

- Ubuntu 16.04 ESM

Summary:

JACK could cause a crash in certain conditions.

Software Description:
- jackd2: JACK Audio Connection Kit (server and example clients)

Details:

Joseph Yasi discovered that JACK incorrectly handled the closing of a socket in certain conditions. An attacker could potentially use this issue to cause a crash.

Update instructions:

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

Ubuntu 16.04 ESM:
jackd2 1.9.10+20150825git1ed50c92~dfsg-1ubuntu1+esm1
jackd2-firewire 1.9.10+20150825git1ed50c92~dfsg-1ubuntu1+esm1
libjack-jackd2-0 1.9.10+20150825git1ed50c92~dfsg-1ubuntu1+esm1

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

References:
https://ubuntu.com/security/notices/USN-5656-1
CVE-2019-13351