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

USN-5746-1: HarfBuzz vulnerability

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Ubuntu Security Notice USN-5746-1
November 28, 2022

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

- Ubuntu 16.04 ESM

Summary:

HarfBuzz could be made to crash if it received specially crafted
input.

Software Description:
- harfbuzz: OpenType text shaping engine

Details:

Behzad Najjarpour Jabbari discovered that HarfBuzz incorrectly handled
certain inputs. A remote attacker could possibly use this issue to cause
a denial of service.

Update instructions:

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

Ubuntu 16.04 ESM:
libharfbuzz-bin 1.0.1-1ubuntu0.1+esm1
libharfbuzz0b 1.0.1-1ubuntu0.1+esm1

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

References:
https://ubuntu.com/security/notices/USN-5746-1
CVE-2015-9274