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Vulnerability of Linux, Xen: memory leak via Blkback Driver

Synthesis of the vulnerability 

An attacker, inside a guest system, can create a memory leak via Blkback Driver of Linux with Xen, in order to trigger a denial of service on the host system.
Impacted software: XenServer, Linux, Xen.
Severity of this computer vulnerability: 1/4.
Creation date: 30/03/2021.
Références of this announce: CERTFR-2021-AVI-227, CERTFR-2021-AVI-228, CTX306565, CVE-2021-28688, VIGILANCE-VUL-34966, XSA-371.

Description of the vulnerability 

An attacker, inside a guest system, can create a memory leak via Blkback Driver ...
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This security threat impacts software or systems such as XenServer, Linux, Xen.

Our Vigil@nce team determined that the severity of this computer weakness note 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 computer threat alert.

Solutions for this threat 

Solutions for this vulnerability are not yet public.
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