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Vulnerability of python-psutil: use after free

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area of python-psutil, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Debian, Fedora, Solaris, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 19/11/2019.
Références of this bulletin: CVE-2019-18874, DLA-1998-1, FEDORA-2020-021fb887ac, FEDORA-2020-a06ebafad8, USN-4204-1, VIGILANCE-VUL-30900.

Description of the vulnerability 

An attacker can force the usage of a freed memory area of python-psutil, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity note impacts software or systems such as Debian, Fedora, Solaris, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness announce is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this cybersecurity vulnerability.

Solutions for this threat 

Debian 8: new python-psutil packages.
New packages are available:
  Debian 8: python-psutil 2.1.1-1+deb8u1

Fedora: new python-psutil packages.
New packages are available:
  Fedora 30: python-psutil 5.6.7-1.fc30
  Fedora 31: python-psutil 5.6.7-1.fc31

Oracle Solaris: patch for third party software of Januray 2020 v3.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

Ubuntu: new python-psutil packages.
New packages are available:
  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
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