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Vulnerability of Linux kernel: use after free via vt_do_kdgkb_ioctl

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via vt_do_kdgkb_ioctl() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Impacted systems: Linux.
Severity of this alert: 2/4.
Creation date: 16/10/2020.
Références of this alert: CVE-2020-25656, VIGILANCE-VUL-33611.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via vt_do_kdgkb_ioctl() o...
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This cybersecurity announce impacts software or systems such as Linux.

Our Vigil@nce team determined that the severity of this threat alert 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 computer weakness alert.

Solutions for this threat 

This vulnerability solution will be public soon.
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