USN-5638-2: Expat vulnerabilities

USN-5638-2: Expat vulnerabilities

USN-5638-1 fixed a vulnerability in Expat. This update provides
the corresponding updates for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS.

Original advisory details:

Rhodri James discovered that Expat incorrectly handled memory when
processing certain malformed XML files. An attacker could possibly
use this issue to cause a crash or execute arbitrary code.
Source: USN-5638-2: Expat vulnerabilities