Security update for xen (important)

An update that solves 10 vulnerabilities and has one errata
is now available.

Description:

This update for xen fixes the following issues:

• CVE-2020-25602: Fixed an issue where there was a crash when handling
  guest access to MSR_MISC_ENABLE was thrown (bsc#1176339,XSA-333)
• CVE-2020-25598: Added a missing unlock in XENMEM_acquire_resource error
  path (bsc#1176341,XSA-334)
• CVE-2020-25604: Fixed a race condition when migrating timers between x86
  HVM vCPU-s (bsc#1176343,XSA-336)
• CVE-2020-25595: Fixed an issue where PCI passthrough code was reading
  back hardware registers (bsc#1176344,XSA-337)
• CVE-2020-25597: Fixed an issue where a valid event channels may not turn
  invalid (bsc#1176346,XSA-338)
• CVE-2020-25596: Fixed a potential denial of service in x86 pv guest
  kernel via SYSENTER (bsc#1176345,XSA-339)
• CVE-2020-25603: Fixed an issue due to missing barriers when
  accessing/allocating an event channel (bsc#1176347,XSA-340)
• CVE-2020-25600: Fixed out of bounds event channels available to 32-bit
  x86 domains (bsc#1176348,XSA-342)
• CVE-2020-25599: Fixed race conditions with evtchn_reset()
  (bsc#1176349,XSA-343)
• CVE-2020-25601: Fixed an issue due to lack of preemption in
  evtchn_reset() / evtchn_destroy() (bsc#1176350,XSA-344)
• Various other fixes (bsc#1027519)

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or “zypper patch”.

Alternatively you can run the command listed for your product:

• openSUSE Leap 15.2:

  zypper in -t patch openSUSE-2020-1608=1