A xen security update has been released for Fedora 30.

Fedora 30 Update: xen-4.11.4-1.fc30

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Fedora Update Notification
FEDORA-2020-cbc3149753
2020-05-11 03:15:32.684279
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Name : xen
Product : Fedora 30
Version : 4.11.4
Release : 1.fc30
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:

update to 4.11.4 ---- multiple xenoprof issues [XSA-313, CVE-2020-11740,
CVE-2020-11741] (#1823912, #1823914) Missing memory barriers in read-write
unlock paths [XSA-314, CVE-2020-11739] (#1823784) Bad error path in
GNTTABOP_map_grant [XSA-316, CVE-2020-11743] (#1823926) Bad continuation
handling in GNTTABOP_copy [XSA-318, CVE-2020-11742] (#1823943)
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ChangeLog:

* Sat Apr 25 2020 Michael Young - 4.11.4-1
- update to 4.11.4
remove patches now fixed upstream
adjust xen.use.fedora.ipxe.patch
* Wed Apr 15 2020 Michael Young - 4.11.3-4
- multiple xenoprof issues [XSA-313, CVE-2020-11740, CVE-2020-11741]
(#1823912, #1823914)
- Missing memory barriers in read-write unlock paths [XSA-314,
CVE-2020-11739] (#1823784)
- Bad error path in GNTTABOP_map_grant [XSA-316, CVE-2020-11743] (#1823926)
- Bad continuation handling in GNTTABOP_copy [XSA-318, CVE-2020-11742]
(#1823943)
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References:

[ 1 ] Bug #1823783 - CVE-2020-11739 xen: missing memory barriers in read-write unlock paths (XSA-314)
https://bugzilla.redhat.com/show_bug.cgi?id=1823783
[ 2 ] Bug #1823911 - CVE-2020-11740 xen: xenoprof issue allows guest OS users without active profiling to obtain sensitive information about other guests (XSA-313)
https://bugzilla.redhat.com/show_bug.cgi?id=1823911
[ 3 ] Bug #1823913 - CVE-2020-11741 xen: xenoprof issue allows guest OS users with active profiling to obtain sensitive information about other guests (XSA-313)
https://bugzilla.redhat.com/show_bug.cgi?id=1823913
[ 4 ] Bug #1823925 - CVE-2020-11743 xen: bad error path in GNTTABOP_map_grant (XSA-316)
https://bugzilla.redhat.com/show_bug.cgi?id=1823925
[ 5 ] Bug #1823942 - CVE-2020-11742 xen: bad continuation handling in GNTTABOP_copy (XSA-318)
https://bugzilla.redhat.com/show_bug.cgi?id=1823942
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-cbc3149753' 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