A needrestart security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.10, and 22.04 LTS.

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Ubuntu Security Notice USN-5426-1
May 17, 2022

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

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

needrestart could be made to run programs.

Software Description:
- needrestart: check which daemons need to be restarted after library upgrades

Details:

Jakub Wilk discovered that needrestart incorrectly used some regular
expressions. A local attacker could possibly use this issue to execute
arbitrary code.

Update instructions:

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

Ubuntu 22.04 LTS:
needrestart 3.5-5ubuntu2.1

Ubuntu 21.10:
needrestart 3.5-4ubuntu2.1

Ubuntu 20.04 LTS:
needrestart 3.4-6ubuntu0.1

Ubuntu 18.04 LTS:
needrestart 3.1-1ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-5426-1
CVE-2022-30688

Package Information:
  https://launchpad.net/ubuntu/+source/needrestart/3.5-5ubuntu2.1
  https://launchpad.net/ubuntu/+source/needrestart/3.5-4ubuntu2.1
  https://launchpad.net/ubuntu/+source/needrestart/3.4-6ubuntu0.1
  https://launchpad.net/ubuntu/+source/needrestart/3.1-1ubuntu0.1