SECURITY: Fedora 31 Update: xen-4.12.3-5.fc31
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Fedora Update Notification
FEDORA-2020-d46fe34349
2020-10-07 20:44:48.204532
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Name : xen
Product : Fedora 31
Version : 4.12.3
Release : 5.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
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Update Information:
x86 pv: Crash when handling guest access to MSR_MISC_ENABLE [XSA-333,
CVE-2020-25602] (#1881619) Missing unlock in XENMEM_acquire_resource error path
[XSA-334, CVE-2020-25598] (#1881616) race when migrating timers between x86 HVM
vCPU-s [XSA-336, CVE-2020-25604] (#1881618) PCI passthrough code reading back
hardware registers [XSA-337, CVE-2020-25595] (#1881587) once valid event
channels may not turn invalid [XSA-338, CVE-2020-25597] (#1881588) x86 pv guest
kernel DoS via SYSENTER [XSA-339, CVE-2020-25596] (#1881617) Missing memory
barriers when accessing/allocating an event channel [XSA-340, CVE-2020-25603]
(#1881583) out of bounds event channels available to 32-bit x86 domains
[XSA-342, CVE-2020-25600] (#1881582) races with evtchn_reset() [XSA-343,
CVE-2020-25599] (#1881581) lack of preemption in evtchn_reset() /
evtchn_destroy() [XSA-344, CVE-2020-25601] (#1881586)
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ChangeLog:
* Tue Sep 22 2020 Michael Young - 4.12.3-5
- x86 pv: Crash when handling guest access to MSR_MISC_ENABLE [XSA-333,
CVE-2020-25602] (#1881619)
- Missing unlock in XENMEM_acquire_resource error path [XSA-334,
CVE-2020-25598] (#1881616)
- race when migrating timers between x86 HVM vCPU-s [XSA-336,
CVE-2020-25604] (#1881618)
- PCI passthrough code reading back hardware registers [XSA-337,
CVE-2020-25595] (#1881587)
- once valid event channels may not turn invalid [XSA-338, CVE-2020-25597]
(#1881588)
- x86 pv guest kernel DoS via SYSENTER [XSA-339, CVE-2020-25596]
(#1881617)
- Missing memory barriers when accessing/allocating an event channel [XSA-340,
CVE-2020-25603] (#1881583)
- out of bounds event channels available to 32-bit x86 domains [XSA-342,
CVE-2020-25600] (#1881582)
- races with evtchn_reset() [XSA-343, CVE-2020-25599] (#1881581)
- lack of preemption in evtchn_reset() / evtchn_destroy() [XSA-344,
CVE-2020-25601] (#1881586)
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References:
[ 1 ] Bug #1877366 - CVE-2020-25603 xen: missing memory barriers when accessing/allocating an event channel (XSA-340)
https://bugzilla.redhat.com/show_bug.cgi?id=1877366
[ 2 ] Bug #1877369 - CVE-2020-25595 xen: PCI passthrough code reading back hardware registers (XSA-337)
https://bugzilla.redhat.com/show_bug.cgi?id=1877369
[ 3 ] Bug #1877378 - CVE-2020-25601 xen: lack of preemption in evtchn_reset() / evtchn_destroy() (XSA-344)
https://bugzilla.redhat.com/show_bug.cgi?id=1877378
[ 4 ] Bug #1877382 - CVE-2020-25604 xen: race when migrating timers between x86 HVM vCPU-s (XSA-336)
https://bugzilla.redhat.com/show_bug.cgi?id=1877382
[ 5 ] Bug #1877383 - CVE-2020-25598 xen: missing unlock in XENMEM_acquire_resource error path (XSA-334)
https://bugzilla.redhat.com/show_bug.cgi?id=1877383
[ 6 ] Bug #1879553 - CVE-2020-25597 xen: once valid event channels may not turn invalid (XSA-338)
https://bugzilla.redhat.com/show_bug.cgi?id=1879553
[ 7 ] Bug #1879567 - CVE-2020-25599 xen: races with evtchn_reset function (XSA-343)
https://bugzilla.redhat.com/show_bug.cgi?id=1879567
[ 8 ] Bug #1880137 - CVE-2020-25596 xen: x86 pv guest kernel DoS via SYSENTER (XSA-339)
https://bugzilla.redhat.com/show_bug.cgi?id=1880137
[ 9 ] Bug #1880156 - CVE-2020-25600 xen: out of bounds event channels available to 32-bit x86 domains (XSA-342)
https://bugzilla.redhat.com/show_bug.cgi?id=1880156
[ 10 ] Bug #1880158 - CVE-2020-25602 xen: x86 pv: Crash when handling guest access to MSR_MISC_ENABLE (XSA-333)
https://bugzilla.redhat.com/show_bug.cgi?id=1880158
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-d46fe34349' 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
A xen security update has been released for Fedora 31.
