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USN-5191-1: Flatpak vulnerability

14 December 2021

A system hardening measure could be bypassed.



  • flatpak - Application deployment framework for desktop apps


It was discovered that Flatpak incorrectly handled certain AF_UNIX sockets.
An attacker could use this to specially craft a Flatpak application that
could escape sandbox confinement.

Update instructions

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

Ubuntu 21.10
Ubuntu 21.04
Ubuntu 20.04
Ubuntu 18.04

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