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Vulnerability of OpenSC: use after free via coolkey_free_private_data

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via coolkey_free_private_data() of OpenSC, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Android OS, RHEL.
Severity of this threat: 2/4.
Creation date: 04/11/2020.
Références of this weakness: CVE-2019-20792, RHSA-2020:4483-01, VIGILANCE-VUL-33788.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via coolkey_free_private_...
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This cybersecurity weakness impacts software or systems such as Android OS, RHEL.

Our Vigil@nce team determined that the severity of this security vulnerability 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 vulnerability bulletin.

Solutions for this threat 

Fixes for this vulnerability are not yet public.
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