SUSE Security Update: Security update for kernel-livepatch-tools
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Announcement ID:    SUSE-SU-2018:2426-1
Rating:             important
References:         #1099306 
Cross-References:   CVE-2018-3646
Affected Products:
                    SUSE Linux Enterprise Module for Live Patching 15
                    SUSE Linux Enterprise Live Patching 12-SP3
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   An update that fixes one vulnerability is now available.

Description:

   This update for kernel-livepatch-tools fixes the following issues:

   Add script for disabling SMT to help with the mitigation of the "L1
   Terminal Fault" issue (CVE-2018-3646 bsc#1099306)

   The script is called "klp-kvm-l1tf-ctrl-smt" and is used for enabling or
   disabling SMT to mitigate the issue when this administrative decision is
   taken.

   Disabling SMT:

           klp-kvm-l1tf-ctrl-smt -d

   Enabling SMT:

           klp-kvm-l1tf-ctrl-smt -e


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:

   - SUSE Linux Enterprise Module for Live Patching 15:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2018-1687=1

   - SUSE Linux Enterprise Live Patching 12-SP3:

      zypper in -t patch SUSE-SLE-Live-Patching-12-SP3-2018-1682=1 SUSE-SLE-Live-Patching-12-SP3-2018-1683=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15 (ppc64le s390x x86_64):

      kernel-livepatch-tools-1.1-5.3.1

   - SUSE Linux Enterprise Live Patching 12-SP3 (ppc64le x86_64):

      kgraft-patch-4_4_138-94_39-default-2-2.1
      kgraft-patch-4_4_138-94_39-default-debuginfo-2-2.1
      kgraft-patch-4_4_140-94_42-default-2-2.1
      kgraft-patch-4_4_140-94_42-default-debuginfo-2-2.1


References:

   https://www.suse.com/security/cve/CVE-2018-3646.html
   https://bugzilla.suse.com/1099306