A GPSd security update has been released for Ubuntu Linux 20.04 LTS and 21.04.

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Ubuntu Security Notice USN-5035-1
August 10, 2021

gpsd vulnerability
==========================================================================

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

- Ubuntu 21.04
- Ubuntu 20.04 LTS

Summary:

GPSd could return the wrong time.

Software Description:
- gpsd: Global Positioning System

Details:

It was discovered that GPSd incorrectly handled certain leap second events
which would result in the time jumping back 1024 weeks on 2021-10-31.

Update instructions:

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

Ubuntu 21.04:
gpsd 3.22-2ubuntu1.2
libgps28 3.22-2ubuntu1.2

Ubuntu 20.04 LTS:
gpsd 3.20-8ubuntu0.4
libgps26 3.20-8ubuntu0.4

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

References:
  https://ubuntu.com/security/notices/USN-5035-1
  https://launchpad.net/bugs/1938730

Package Information:
  https://launchpad.net/ubuntu/+source/gpsd/3.22-2ubuntu1.2
  https://launchpad.net/ubuntu/+source/gpsd/3.20-8ubuntu0.4