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Vulnerability of Linux kernel: information disclosure via retrieve_ptr_limit

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via retrieve_ptr_limit() of the Linux kernel, in order to obtain sensitive information.
Vulnerable systems: Debian, Fedora, Linux, Ubuntu.
Severity of this threat: 2/4.
Creation date: 19/03/2021.
Références of this weakness: CERTFR-2021-AVI-217, CERTFR-2021-AVI-220, CVE-2020-27171, DLA-2610-1, FEDORA-2021-e49da8a226, USN-4887-1, USN-4890-1, VIGILANCE-VUL-34892.

Description of the vulnerability 

An attacker can bypass access restrictions to data via retrieve_ptr_limit() of t...
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This vulnerability alert impacts software or systems such as Debian, Fedora, Linux, Ubuntu.

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

Solutions for this threat 

This vulnerability workaround will be public soon.
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