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

USN-5409-1: libsndfile vulnerability

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Ubuntu Security Notice USN-5409-1
May 10, 2022

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

- Ubuntu 16.04 ESM

Summary:

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

Software Description:
- libsndfile: Library for reading/writing audio files

Details:

It was discovered that libsndfile was incorrectly performing memory
management operations and incorrectly using buffers when executing
its FLAC codec. If a user or automated system were tricked into
processing a specially crafted sound file, an attacker could
possibly use this issue to cause a denial of service or obtain
sensitive information.

Update instructions:

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

Ubuntu 16.04 ESM:
libsndfile1 1.0.25-10ubuntu0.16.04.3+esm2
libsndfile1-dev 1.0.25-10ubuntu0.16.04.3+esm2
sndfile-programs 1.0.25-10ubuntu0.16.04.3+esm2

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

References:
https://ubuntu.com/security/notices/USN-5409-1
CVE-2021-4156