A xen security update has been released for Fedora 33.

SECURITY: Fedora 33 Update: xen-4.14.2-2.fc33

--------------------------------------------------------------------------------
Fedora Update Notification
FEDORA-2021-993693c914
2021-06-17 01:10:28.004042
--------------------------------------------------------------------------------

Name : xen
Product : Fedora 33
Version : 4.14.2
Release : 2.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

--------------------------------------------------------------------------------
Update Information:

xen/arm: Boot modules are not scrubbed [XSA-372, CVE-2021-28693] inappropriate
x86 IOMMU timeout detection / handling [XSA-373, CVE-2021-28692] Speculative
Code Store Bypass [XSA-375, CVE-2021-0089] x86: TSX Async Abort protections not
restored after S3 [XSA-377, CVE-2021-28690]
--------------------------------------------------------------------------------
ChangeLog:

* Tue Jun 8 2021 Michael Young - 4.14.2-2
- xen/arm: Boot modules are not scrubbed [XSA-372, CVE-2021-28693]
- inappropriate x86 IOMMU timeout detection / handling
[XSA-373, CVE-2021-28692]
- Speculative Code Store Bypass [XSA-375, CVE-2021-0089]
- x86: TSX Async Abort protections not restored after S3
[XSA-377, CVE-2021-28690]
--------------------------------------------------------------------------------
References:

[ 1 ] Bug #1970530 - CVE-2021-0089 CVE-2021-26313 CVE-2021-0086 CVE-2021-26314 xen: speculative code store bypass (XSA-375)
  https://bugzilla.redhat.com/show_bug.cgi?id=1970530
[ 2 ] Bug #1970539 - CVE-2021-28692 xen: inappropriate x86 IOMMU timeout detection / handling (XSA-373)
  https://bugzilla.redhat.com/show_bug.cgi?id=1970539
[ 3 ] Bug #1970541 - CVE-2021-28693 xen: arm: boot modules are not scrubbed (XSA-372)
  https://bugzilla.redhat.com/show_bug.cgi?id=1970541
[ 4 ] Bug #1970545 - CVE-2021-28690 xen: x86: TSX Async Abort protections not restored after S3 (XSA-377)
  https://bugzilla.redhat.com/show_bug.cgi?id=1970545
--------------------------------------------------------------------------------

This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-993693c914' 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