Security update for xen (important)

An update that solves 8 vulnerabilities and has one errata
is now available.

Description:

This update for xen fixes the following issues:

 - CVE-2022-33746: Fixed DoS due to excessively long P2M pool freeing
   (bsc#1203806).
 - CVE-2022-33748: Fixed DoS due to race in locking (bsc#1203807).
 - CVE-2022-26365: Fixed issue where Linux Block and Network PV device
   frontends don't zero memory regions before sharing them with the
   backend (bsc#1200762).
 - CVE-2022-33740: Fixed issue where Linux Block and Network PV device
   frontends don't zero memory regions before sharing them with the
   backend (bsc#1200762).
 - CVE-2022-33741: Fixed issue where data residing in the same 4K page as
   data shared with a backend was being accessible by such backend
   (bsc#1200762).
 - CVE-2022-33742: Fixed issue where data residing in the same 4K page as
   data shared with a backend was being accessible by such backend
   (bsc#1200762).
 - CVE-2022-33745: Fixed an insufficient TLB flush for x86 PV guests in
   shadow mode (bsc#1201394).
 - CVE-2021-28689: Fixed speculative vulnerabilities with bare (non-shim)
   32-bit PV guests (bsc#1185104).

 Bugfixes:

 - Fixed logic error in built-in default of max_event_channels
   (bsc#1167608, bsc#1201631).
 - Fixed issue where dom0 fails to boot with constrained vcpus and nodes
   (bsc#1197081).
 - Included upstream bugfixes (bsc#1027519).

Patch Instructions:

To install this SUSE 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 Micro 5.2:

  zypper in -t patch openSUSE-Leap-Micro-5.2-2022-3665=1

• openSUSE Leap 15.3:

  zypper in -t patch openSUSE-SLE-15.3-2022-3665=1

• SUSE Linux Enterprise Module for Server Applications 15-SP3:

  zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP3-2022-3665=1

• SUSE Linux Enterprise Module for Basesystem 15-SP3:

  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP3-2022-3665=1

• SUSE Linux Enterprise Micro 5.2:

  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2022-3665=1

• SUSE Linux Enterprise Micro 5.1:

  zypper in -t patch SUSE-SUSE-MicroOS-5.1-2022-3665=1