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Vulnerability of Xen, Linux: denial of service via Map Foreign Pages

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger a fatal error via Map Foreign Pages of Xen with Linux, in order to trigger a denial of service on the host system.
Impacted systems: Linux, Xen.
Severity of this alert: 2/4.
Creation date: 04/03/2021.
Références of this alert: CVE-2021-28039, VIGILANCE-VUL-34751, XSA-369.

Description of the vulnerability 

An attacker, inside a guest system, can trigger a fatal error via Map Foreign Pages of Xen with Linux, in order to trigger a denial of service on the host system.
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This computer vulnerability alert impacts software or systems such as Linux, Xen.

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

Solutions for this threat 

Xen, Linux: patch for Map Foreign Pages.
A patch is available:
  http://xenbits.xen.org/xsa/xsa369-linux.patch
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Computer vulnerabilities tracking service 

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