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USN-4951-1: Flatpak vulnerability

12 May 2021

A Flatpak application could access files that it would not normally be permitted to access.



  • flatpak - Application deployment framework for desktop apps


Anton Lydike discovered that Flatpak did not properly handle special tokens
in desktop files. 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 20.10
Ubuntu 20.04
Ubuntu 18.04

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