A xen security update has been released for Fedora 34.

SECURITY: Fedora 34 Update: xen-4.14.1-7.fc34

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Fedora Update Notification
FEDORA-2021-7b4dcfcb6d
2021-03-31 00:15:12.087321
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Name : xen
Product : Fedora 34
Version : 4.14.1
Release : 7.fc34
URL :   http://xen.org/
Summary : Xen is a virtual machine monitor
Description :
This package contains the XenD daemon and xm command line
tools, needed to manage virtual machines running under the
Xen hypervisor

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Update Information:

HVM soft-reset crashes toolstack [XSA-368, CVE-2021-28687] (#1940610)
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ChangeLog:

* Thu Mar 18 2021 Michael Young - 4.14.1-7
- HVM soft-reset crashes toolstack [XSA-368, CVE-2021-28687] (#1940610)
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References:

[ 1 ] Bug #1940609 - CVE-2021-28687 xen: HVM soft-reset crashes toolstack (XSA-368)
  https://bugzilla.redhat.com/show_bug.cgi?id=1940609
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-7b4dcfcb6d' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys