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Vulnerability of Xen, Linux: security improvement via Display Frontend Be-alloc

Synthesis of the vulnerability 

The security of Xen was improved because Display Frontend Be-alloc is unsupported.
Vulnerable software: Fedora, Linux.
Severity of this announce: 1/4.
Creation date: 16/02/2021.
Références of this computer vulnerability: CVE-2021-26934, FEDORA-2021-47f53a940a, FEDORA-2021-4c819bf1ad, VIGILANCE-VUL-34591, XSA-363.

Description of the vulnerability 

The security of Xen was improved because Display Frontend Be-alloc is unsupported.
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This security note impacts software or systems such as Fedora, Linux.

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

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this computer weakness announce.

Solutions for this threat 

Xen, Linux: patch for Display Frontend Be-alloc.
A patch is available, to change the support message:
  http://xenbits.xen.org/xsa/xsa363.patch

Fedora 32-33: new xen packages.
New packages are available:
  Fedora 32: xen 4.13.2-7.fc32
  Fedora 33: xen 4.14.1-5.fc33
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