A xen security update has been released for Fedora 35.

SECURITY: Fedora 35 Update: xen-4.15.1-4.fc35

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Fedora Update Notification
FEDORA-2021-03645e9807
2021-12-01 01:19:37.797895
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Name : xen
Product : Fedora 35
Version : 4.15.1
Release : 4.fc35
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:

guests may exceed their designated memory limit [XSA-385, CVE-2021-28706] PoD
operations on misaligned GFNs [XSA-388, CVE-2021-28704, CVE-2021-28707
CVE-2021-28708] issues with partially successful P2M updates on x86 [XSA-389,
CVE-2021-28705, CVE-2021-28709] certain VT-d IOMMUs may not work in shared page
table mode [XSA-390, CVE-2021-28710]
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ChangeLog:

* Tue Nov 23 2021 Michael Young - 4.15.1-4
- guests may exceed their designated memory limit [XSA-385, CVE-2021-28706]
- PoD operations on misaligned GFNs [XSA-388, CVE-2021-28704, CVE-2021-28707
CVE-2021-28708]
- issues with partially successful P2M updates on x86 [XSA-389,
CVE-2021-28705, CVE-2021-28709]
- certain VT-d IOMMUs may not work in shared page table mode [XSA-390,
CVE-2021-28710]
* Wed Oct 6 2021 Michael Young - 4.15.1-3
- rebuild (f36 only) for OCaml 4.13.1
* Tue Oct 5 2021 Michael Young - 4.15.1-2
- PCI devices with RMRRs not deassigned correctly [XSA-386, CVE-2021-28702]
(#2011248)
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References:

[ 1 ] Bug #2025046 - CVE-2021-28710 xen: Certain VT-d IOMMUs may not work in shared page table mode
  https://bugzilla.redhat.com/show_bug.cgi?id=2025046
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2021-03645e9807' 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
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