A Linux kernel (Azure) security update has been released for Ubuntu Linux 16.04 ESM.

USN-5652-1: Linux kernel (Azure) vulnerabilities

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Ubuntu Security Notice USN-5614-2
October 03, 2022

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

- Ubuntu 16.04 ESM

Summary:

Wayland could be made to crash or run programs.

Software Description:
- wayland: Wayland compositor infrastructure

Details:

USN-5614-1 fixed a vulnerability in Wayland. This update
provides the corresponding update for Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that Wayland incorrectly handled reference counting
certain objects. An attacker could use this issue to cause Wayland to
crash, resulting in a denial of service, or possibly execute arbitrary
code.

Update instructions:

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

Ubuntu 16.04 ESM:
libwayland-bin 1.12.0-1~ubuntu16.04.3+esm1
libwayland-client0 1.12.0-1~ubuntu16.04.3+esm1
libwayland-cursor0 1.12.0-1~ubuntu16.04.3+esm1
libwayland-server0 1.12.0-1~ubuntu16.04.3+esm1

After a standard system update you need to reboot your computer to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5614-2
https://ubuntu.com/security/notices/USN-5614-1
CVE-2021-3782