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Vulnerability of Xen: information disclosure via S3 TSX Async Abort protections

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass access restrictions to data via S3 TSX Async Abort protections of Xen, in order to obtain sensitive information on the host system.
Impacted software: Xen.
Severity of this computer vulnerability: 1/4.
Creation date: 08/06/2021.
Références of this announce: CERTFR-2021-AVI-453, CVE-2021-28690, VIGILANCE-VUL-35656, XSA-377.

Description of the vulnerability 

An attacker, inside a guest system, can bypass access restrictions to data via S...
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This weakness impacts software or systems such as Xen.

Our Vigil@nce team determined that the severity of this vulnerability announce is low.

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 threat bulletin.

Solutions for this threat 

This vulnerability patch will be public soon.
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