Security update for xen (important)

An update that fixes 6 vulnerabilities is now available.

Description:

This update for xen fixes the following issues:

• CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a
  race condition in the Instruction Fetch Unit of the Intel CPU to cause a
  Machine Exception during Page Size Change, causing the CPU core to be
  non-functional. (bsc#1155945)
• CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs
  with Transactional Memory support could be used to facilitate
  sidechannel information leaks out of microarchitectural buffers, similar
  to the previously described “Microarchitectural Data Sampling” attack.
  (bsc#1152497).
• CVE-2019-18425: 32-bit PV guest user mode could elevate its privileges
  to that
  of the guest kernel. (bsc#1154456).
• CVE-2019-18421: A malicious PV guest administrator may have been able to
  escalate their privilege to that of the host. (bsc#1154458).
• CVE-2019-18420: Malicious x86 PV guests may have caused a hypervisor
  crash, resulting in a Denial of Service (Dos). (bsc#1154448)

This update was imported from the SUSE:SLE-15: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 15.0:

  zypper in -t patch openSUSE-2019-2506=1