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Vulnerability of GRUB2: integer overflow via grub_ext2_read_link

Synthesis of the vulnerability 

An attacker can trigger an integer overflow via grub_ext2_read_link() of GRUB2, in order to trigger a denial of service, and possibly to run code.
Impacted products: Debian, Windows 10, Windows 2012, Windows 2016, Windows 2019, Windows 8, Windows RT, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) ~ not comprehensive.
Severity of this bulletin: 1/4.
Creation date: 30/07/2020.
Références of this threat: ADV200011, CERTFR-2020-AVI-475, CERTFR-2020-AVI-476, CERTFR-2020-AVI-477, CERTFR-2020-AVI-485, CVE-2020-14311, DSA-4735-1, DSA-4735-2, RHSA-2020:3216-01, RHSA-2020:3217-01, RHSA-2020:3223-01, RHSA-2020:3227-01, RHSA-2020:3271-01, RHSA-2020:3273-01, RHSA-2020:3274-01, RHSA-2020:3275-01, RHSA-2020:3276-01, SUSE-SU-2020:14440-1, SUSE-SU-2020:2073-1, SUSE-SU-2020:2074-1, SUSE-SU-2020:2076-1, SUSE-SU-2020:2077-1, SUSE-SU-2020:2078-1, SUSE-SU-2020:2079-1, USN-4432-1, USN-4432-2, VIGILANCE-VUL-32955.

Description of the vulnerability 

An attacker can trigger an integer overflow via grub_ext2_read_link() of GRUB2, ...
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This security vulnerability impacts software or systems such as Debian, Windows 10, Windows 2012, Windows 2016, Windows 2019, Windows 8, Windows RT, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) ~ not comprehensive.

Our Vigil@nce team determined that the severity of this computer weakness bulletin is low.

The trust level is of type confirmed by the editor, with an origin of physical access.

An attacker with a expert ability can exploit this security note.

Solutions for this threat 

This vulnerability fix will be public soon.
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