A XZ Utils security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 21.10.

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Ubuntu Security Notice USN-5378-2
April 13, 2022

xz-utils vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

XZ Utils could be made to overwrite arbitrary files.

Software Description:
- xz-utils: XZ-format compression utilities

Details:

Cleemy Desu Wayo discovered that XZ Utils incorrectly handled certain
filenames. If a user or automated system were tricked into performing
xzgrep operations with specially crafted filenames, a remote attacker could
overwrite arbitrary files.

Update instructions:

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

Ubuntu 21.10:
xz-utils 5.2.5-2ubuntu0.1

Ubuntu 20.04 LTS:
xz-utils 5.2.4-1ubuntu1.1

Ubuntu 18.04 LTS:
xz-utils 5.2.2-1.3ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-5378-2
  https://ubuntu.com/security/notices/USN-5378-1
CVE-2022-1271

Package Information:
  https://launchpad.net/ubuntu/+source/xz-utils/5.2.5-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/xz-utils/5.2.4-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/xz-utils/5.2.2-1.3ubuntu0.1