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Vulnerability of Ubuntu: read-write access via overlayfs File System

Synthesis of the vulnerability 

An attacker can bypass access restrictions via overlayfs File System of Ubuntu, in order to read or alter data.
Impacted products: Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 16/04/2021.
Références of this threat: CERTFR-2021-AVI-277, CVE-2021-3493, USN-4915-1, USN-4916-1, USN-4916-2, USN-4917-1, VIGILANCE-VUL-35097.

Description of the vulnerability 

An attacker can bypass access restrictions via overlayfs File System of Ubuntu, ...
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This threat impacts software or systems such as Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat 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 cybersecurity bulletin.

Solutions for this threat 

This vulnerability fix will be public soon.
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