Fedora alert FEDORA-2018-0746dac335 (xen)

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updates@fedoraproject.org 
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package-announce@lists.fedoraproject.org 
Subject:
    	     
 
[SECURITY] Fedora 26 Update: xen-4.8.3-3.fc26 
Date:
    	     
 
Tue, 20 Mar 2018 17:37:29 +0000 (UTC)
Message-ID:
    	     
 
<20180320173729.977BB60A6180@bastion01.phx2.fedoraproject.org>
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Fedora Update Notification
FEDORA-2018-0746dac335
2018-03-20 17:27:15.776875
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Name        : xen
Product     : Fedora 26
Version     : 4.8.3
Release     : 3.fc26
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 Xen page-table isolation (XPTI) mitigation and add Branch Target
Injection (BTI) mitigation for XSA-254 DoS via non-preemptable L3/L4 pagetable
freeing [XSA-252] (#1549568) grant table v2 -> v1 transition may crash Xen
[XSA-255] (#1549570) x86 PVH guest without LAPIC may DoS the host [XSA-256]
(#1549572)
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References:

  [ 1 ] Bug #1544456 - CVE-2018-7540 xsa252 xen: DoS via non-preemptable L3/L4 pagetable freeing
(XSA-252)
        https://bugzilla.redhat.com/show_bug.cgi?id=1544456

  [ 2 ] Bug #1544459 - CVE-2018-7541 xsa255 xen: grant table v2 -> v1 transition may crash Xen
(XSA-255)
        https://bugzilla.redhat.com/show_bug.cgi?id=1544459

  [ 3 ] Bug #1544453 - CVE-2018-7542 xsa256 xen: x86 PVH guest without LAPIC may DoS the host
(XSA-256)
        https://bugzilla.redhat.com/show_bug.cgi?id=1544453

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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade xen' at the command line.
For more information, refer to the dnf documentation available at
http://dnf.readthedocs.io/en/latest/command_ref.html#upgr...

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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