A xen security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: xen-4.14.0-6.fc33

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Fedora Update Notification
FEDORA-2020-97775b4234
2020-10-26 01:05:46.531309
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Name : xen
Product : Fedora 33
Version : 4.14.0
Release : 6.fc33
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:

x86: Race condition in Xen mapping code [XSA-345] undue deferral of IOMMU TLB
flushes [XSA-346] unsafe AMD IOMMU page table updates [XSA-347]
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ChangeLog:

* Tue Oct 20 2020 Michael Young - 4.14.0-6
- x86: Race condition in Xen mapping code [XSA-345]
- undue deferral of IOMMU TLB flushes [XSA-346]
- unsafe AMD IOMMU page table updates [XSA-347]
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-97775b4234' 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