Fedora 31: FEDORA-2020-6dd36a716c Critical: Xen IOMMU Updates

This package contains the XenD daemon and xm command line

tools, needed to manage virtual machines running under the

Xen hypervisor

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]

* Tue Nov 3 2020 Michael Young - 4.12.3-8

- revised patch for XSA-286 (mitigating performance impact)

* Thu Oct 29 2020 Michael Young - 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 - 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)

[ 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

su -c 'dnf upgrade --advisory FEDORA-2020-6dd36a716c' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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/security/

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