Security update for the Linux Kernel (Live Patch 26 for SLE 12 SP2)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 26 for SLE 12 SP2)
Announcement ID: SUSE-SU-2019:0709-1
Rating: important
References: #1124729 #1124734 #1128378
Cross-References: CVE-2019-6974 CVE-2019-7221 CVE-2019-9213
Affected Products:
  • SUSE Linux Enterprise Server for SAP 12-SP2
  • SUSE Linux Enterprise Server 12-SP2-LTSS

An update that fixes three vulnerabilities is now available.

Description:

This update for the Linux Kernel 4.4.121-92_98 fixes several issues.
The following security issues were fixed:

  • CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bsc#1128378).
  • CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124734).
  • CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bsc#1124729).

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 for SAP 12-SP2:
    zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-709=1 SUSE-SLE-SAP-12-SP2-2019-710=1
  • SUSE Linux Enterprise Server 12-SP2-LTSS:
    zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-709=1 SUSE-SLE-SERVER-12-SP2-2019-710=1

Package List:

  • SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le x86_64):
    • kgraft-patch-4_4_121-92_98-default-4-2.1
  • SUSE Linux Enterprise Server for SAP 12-SP2 (x86_64):
    • kgraft-patch-4_4_121-92_92-default-6-2.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le x86_64):
    • kgraft-patch-4_4_121-92_98-default-4-2.1
  • SUSE Linux Enterprise Server 12-SP2-LTSS (x86_64):
    • kgraft-patch-4_4_121-92_92-default-6-2.1

References: