USN-4204-1: psutil vulnerability

28 November 2019

python-psutil vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


psutil could be made to crash or run programs.

Software Description

  • python-psutil - module providing convenience functions for managing processes


Riccardo Schirone discovered that psutil incorrectly handled certain reference counting operations. An attacker could use this issue to cause psutil to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 19.10
python-psutil - 5.5.1-1ubuntu0.19.10.1
python3-psutil - 5.5.1-1ubuntu0.19.10.1
Ubuntu 19.04
python-psutil - 5.5.1-1ubuntu0.19.04.1
python3-psutil - 5.5.1-1ubuntu0.19.04.1
Ubuntu 18.04 LTS
python-psutil - 5.4.2-1ubuntu0.1
python3-psutil - 5.4.2-1ubuntu0.1
Ubuntu 16.04 LTS
python-psutil - 3.4.2-1ubuntu0.1
python3-psutil - 3.4.2-1ubuntu0.1

To update your system, please follow these instructions:

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