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Vulnerability of FreeBSD: use after free via cryptodev

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via cryptodev of FreeBSD, in order to trigger a denial of service, and possibly to run code.
Impacted software: FreeBSD.
Severity of this computer vulnerability: 2/4.
Creation date: 13/05/2020.
Références of this announce: CVE-2019-15879, FreeBSD-SA-20:15.cryptodev, VIGILANCE-VUL-32254.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via cryptodev of FreeBSD,...
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This computer weakness bulletin impacts software or systems such as FreeBSD.

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

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

An attacker with a expert ability can exploit this threat announce.

Solutions for this threat 

This vulnerability patch will be public soon.
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