=========================================================================Ubuntu Security Notice USN-5524-1
July 19, 2022

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

HarfBuzz could be made to crash if it opened specially crafted data.

Software Description:
- harfbuzz: OpenType text shaping engine

Details:

It was discovered that HarfBuzz incorrectly handled certain glyph sizes. A
remote attacker could use this issue to cause HarfBuzz to crash, resulting
in a denial of service.

Update instructions:

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

Ubuntu 22.04 LTS:
  libharfbuzz0b                   2.7.4-1ubuntu3.1

Ubuntu 20.04 LTS:
  libharfbuzz0b                   2.6.4-1ubuntu4.2

After a standard system update you need to restart your session to make all
the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5524-1
  CVE-2022-33068

Package Information:
  https://launchpad.net/ubuntu/+source/harfbuzz/2.7.4-1ubuntu3.1
  https://launchpad.net/ubuntu/+source/harfbuzz/2.6.4-1ubuntu4.2