-------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2020-6dd36a716c 2020-11-20 01:28:41.818164 --------------------------------------------------------------------------------
Name : xen Product : Fedora 31 Version : 4.12.3 Release : 8.fc31 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:
revised patch for XSA-286 (mitigating performance impact) ---- x86 PV guest INVLPG-like flushes may leave stale TLB entries [XSA-286, CVE-2020-27674] (#1891092) ---- 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] -------------------------------------------------------------------------------- ChangeLog:
* Tue Nov 3 2020 Michael Young m.a.young@durham.ac.uk - 4.12.3-8 - revised patch for XSA-286 (mitigating performance impact) * Thu Oct 29 2020 Michael Young m.a.young@durham.ac.uk - 4.12.3-7 - x86 PV guest INVLPG-like flushes may leave stale TLB entries [XSA-286, CVE-2020-27674] (#1891092) * Tue Oct 20 2020 Michael Young m.a.young@durham.ac.uk - 4.12.3-6 - x86: Race condition in Xen mapping code [XSA-345, CVE-2020-27672] (#1891097) - undue deferral of IOMMU TLB flushes [XSA-346, CVE-2020-27671] (#1891093) - unsafe AMD IOMMU page table updates [XSA-347, CVE-2020-27670] (#1891088) -------------------------------------------------------------------------------- References:
[ 1 ] Bug #1891087 - CVE-2020-27670 xen: unsafe AMD IOMMU page table updates (XSA-347) https://bugzilla.redhat.com/show_bug.cgi?id=1891087 [ 2 ] Bug #1891089 - CVE-2020-27674 xen: x86 PV guest INVLPG-like flushes may leave stale TLB entries (XSA-286) https://bugzilla.redhat.com/show_bug.cgi?id=1891089 [ 3 ] Bug #1891091 - CVE-2020-27671 xen: undue deferral of IOMMU TLB flushes (XSA-346) https://bugzilla.redhat.com/show_bug.cgi?id=1891091 [ 4 ] Bug #1891096 - CVE-2020-27672 xen: x86: race condition in Xen mapping code (XSA-345) https://bugzilla.redhat.com/show_bug.cgi?id=1891096 --------------------------------------------------------------------------------
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2020-6dd36a716c' 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
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