An Emacs security update has been released for Ubuntu Linux 16.04 ESM.

USN-5955-1: Emacs vulnerability

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Ubuntu Security Notice USN-5955-1
March 15, 2023

emacs24 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

Emacs could be made to crash or run programs as your login if it
opened a specially crafted file.

Software Description:
- emacs24: GNU Emacs editor

Details:

It was discovered that Emacs did not properly manage certain files when
using htmlfontify functionality. A local attacker could possibly use this
issue to cause a denial of service, or possibly execute arbitrary commands.

Update instructions:

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

Ubuntu 16.04 ESM:
emacs24 24.5+1-6ubuntu1.1+esm2

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

References:
https://ubuntu.com/security/notices/USN-5955-1
CVE-2022-48339