A util-linux security update has been released for Ubuntu 16.04 ESM.

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Ubuntu Security Notice USN-5478-1
June 14, 2022

util-linux vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

A util-linux program could be made to crash if it opened a specially
crafted file system.

Software Description:
- util-linux: miscellaneous system utilities

Details:

Christian Moch and Michael Gruhn discovered that the libblkid library
of util-linux did not properly manage memory under certain
circumstances. A local attacker could possibly use this issue to cause
denial of service by consuming all memory through
a specially crafted MSDOS partition table.

Update instructions:

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

Ubuntu 16.04 ESM:
libblkid1 2.27.1-6ubuntu3.10+esm2
util-linux 2.27.1-6ubuntu3.10+esm2

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

References:
  https://ubuntu.com/security/notices/USN-5478-1
CVE-2016-5011