Security update for the Linux Kernel (Live Patch 26 for SLE 12)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 26 for SLE 12)
Announcement ID: SUSE-SU-2018:2352-1
Rating: important
References: #1096564 #1097108 #1099306
Affected Products:
  • SUSE Linux Enterprise Server 12-LTSS

  • An update that fixes three vulnerabilities is now available.


    This update for the Linux Kernel 3.12.61-52_89 fixes several issues.

    The following security issues were fixed:

    - CVE-2018-3646: Local attackers in virtualized guest systems could use
    speculative code patterns on hyperthreaded processors to read data
    present in the L1 Datacache used by other hyperthreads on the same CPU
    core, potentially leaking sensitive data, even from other virtual
    machines or the host system (bsc#1099306).
    - CVE-2017-11600: net/xfrm/xfrm_policy.c did not ensure that the dir value
    of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allowed local
    users to cause a denial of service (out-of-bounds access) or possibly
    have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink
    message (bsc#1096564)
    - CVE-2018-10853: A flaw was found in kvm. In which certain instructions
    such as sgdt/sidt call segmented_write_std didn't propagate access
    correctly. As such, during userspace induced exception, the guest can
    incorrectly assume that the exception happened in the kernel and panic.

    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 Server 12-LTSS:
      zypper in -t patch SUSE-SLE-SERVER-12-2018-1588=1

    Package List:

    • SUSE Linux Enterprise Server 12-LTSS (x86_64):
      • kgraft-patch-3_12_61-52_89-default-11-2.1
      • kgraft-patch-3_12_61-52_89-xen-11-2.1