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Synthesis of the vulnerability 
An attacker can force the usage of a freed memory area via io_grab_files() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
 Vulnerable software: Linux.
Severity of this announce: 2/4.
Creation date: 08/02/2021.
Références of this computer vulnerability: CVE-2021-20226, RHBUG-1873476, VIGILANCE-VUL-34507, ZDI-21-001.
Description of the vulnerability 
An attacker can force the usage of a freed memory area via io_grab_files() of th...
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This weakness bulletin impacts software or systems such as Linux.
Our Vigil@nce team determined that the severity of this computer weakness 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 vulnerability announce.
Solutions for this threat 
Solutions for this vulnerability are not yet public.
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