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Vulnerability of libEBML: use after free via EbmlMaster-Read

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via EbmlMaster::Read() of libEBML, in order to trigger a denial of service, and possibly to run code.
Impacted software: Fedora.
Severity of this computer vulnerability: 2/4.
Creation date: 01/02/2021.
Références of this announce: FEDORA-2021-6c4215787a, FEDORA-2021-e84e1aaa2c, VIGILANCE-VUL-34444.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via EbmlMaster::Read() of...
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This security bulletin impacts software or systems such as Fedora.

Our Vigil@nce team determined that the severity of this cybersecurity 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 vulnerability alert.

Solutions for this threat 

Solutions for this vulnerability are not yet public.
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