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Vulnerability of Linux kernel: use after free via tun_get_user

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via tun_get_user() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable products: Android OS, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this weakness: 2/4.
Creation date: 08/02/2021.
Références of this bulletin: 1180812, CERTFR-2021-AVI-111, CERTFR-2021-AVI-120, CERTFR-2021-AVI-138, CVE-2021-0342, openSUSE-SU-2021:0241-1, SUSE-SU-2021:0347-1, SUSE-SU-2021:0348-1, SUSE-SU-2021:0353-1, SUSE-SU-2021:0354-1, SUSE-SU-2021:0427-1, SUSE-SU-2021:0433-1, SUSE-SU-2021:0532-1, VIGILANCE-VUL-34506.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via tun_get_user() of the...
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This threat announce impacts software or systems such as Android OS, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.

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

Solutions for this threat 

Solutions, fixes, patches and workarounds for this vulnerability are not yet public.
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