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USN-3847-1: Linux kernel vulnerabilities

20 December 2018

Several security issues were fixed in the Linux kernel.

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Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-kvm - Linux kernel for cloud environments
  • linux-oem - Linux kernel for OEM processors
  • linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

It was discovered that a race condition existed in the raw MIDI driver for
the Linux kernel, leading to a double free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2018-10902)

It was discovered that an integer overrun vulnerability existed in the
POSIX timers implementation in the Linux kernel. A local attacker could use
this to cause a denial of service. (CVE-2018-12896)

Noam Rathaus discovered that a use-after-free vulnerability existed in the
Infiniband implementation in the Linux kernel. An attacker could use this
to cause a denial of service (system crash). (CVE-2018-14734)

It was discovered that the YUREX USB device driver for the Linux kernel did
not properly restrict user space reads or writes. A physically proximate
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-16276)

It was discovered that the BPF verifier in the Linux kernel did not
correctly compute numeric bounds in some situations. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2018-18445)

Kanda Motohiro discovered that writing extended attributes to an XFS file
system in the Linux kernel in certain situations could cause an error
condition to occur. A local attacker could use this to cause a denial of
service. (CVE-2018-18690)

It was discovered that an integer overflow vulnerability existed in the
CDROM driver of the Linux kernel. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2018-18710)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 18.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

Related notices

  • USN-3847-2: linux-image-4.15.0-43-lowlatency, linux-image-4.15.0-43-generic-lpae, linux-gcp, linux-image-4.15.0-1031-aws, linux-image-unsigned-4.15.0-43-lowlatency, linux-hwe, linux-azure, linux-image-unsigned-4.15.0-1026-gcp, linux-image-unsigned-4.15.0-1036-azure, linux-image-unsigned-4.15.0-43-generic, linux-image-4.15.0-43-generic, linux-aws-hwe
  • USN-3847-3: linux-azure, linux-image-unsigned-4.15.0-1036-azure
  • USN-3776-1: linux-aws, linux-image-4.4.0-137-generic-lpae, linux-image-4.4.0-137-powerpc-smp, linux-image-extra-4.4.0-137-generic, linux-image-4.4.0-137-lowlatency, linux-image-4.4.0-1035-kvm, linux-kvm, linux-image-4.4.0-1102-snapdragon, linux-snapdragon, linux-image-4.4.0-1069-aws, linux-image-4.4.0-1098-raspi2, linux, linux-image-4.4.0-137-generic, linux-image-4.4.0-137-powerpc64-smp, linux-raspi2, linux-image-4.4.0-137-powerpc-e500mc, linux-image-4.4.0-137-powerpc64-emb
  • USN-3776-2: linux-aws, linux-image-4.4.0-137-generic-lpae, linux-image-4.4.0-137-powerpc-smp, linux-image-extra-4.4.0-137-generic, linux-image-4.4.0-137-lowlatency, linux-image-4.4.0-1031-aws, linux-lts-xenial, linux-image-4.4.0-137-powerpc64-smp, linux-image-4.4.0-137-generic, linux-image-4.4.0-137-powerpc-e500mc, linux-image-4.4.0-137-powerpc64-emb
  • USN-3849-2: linux-lts-trusty, linux-image-3.13.0-164-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-164-generic, linux-image-generic-lts-trusty
  • USN-3849-1: linux-image-3.13.0-164-powerpc64-smp, linux-image-3.13.0-164-lowlatency, linux-image-3.13.0-164-powerpc-smp, linux-image-3.13.0-164-powerpc-e500mc, linux-image-3.13.0-164-powerpc-e500, linux, linux-image-3.13.0-164-generic-lpae, linux-image-extra-3.13.0-164-generic, linux-image-3.13.0-164-generic, linux-image-3.13.0-164-powerpc64-emb
  • USN-3848-1: linux-aws, linux-image-4.4.0-1039-kvm, linux-image-4.4.0-141-generic-lpae, linux-image-4.4.0-141-powerpc-smp, linux-image-4.4.0-141-powerpc64-smp, linux-image-4.4.0-141-powerpc64-emb, linux-kvm, linux-snapdragon, linux-image-4.4.0-141-powerpc-e500mc, linux-image-4.4.0-1074-aws, linux, linux-image-4.4.0-1106-snapdragon, linux-image-4.4.0-141-lowlatency, linux-image-4.4.0-1102-raspi2, linux-image-extra-4.4.0-141-generic, linux-raspi2, linux-image-4.4.0-141-generic
  • USN-3848-2: linux-aws, linux-image-4.4.0-141-generic-lpae, linux-image-4.4.0-141-powerpc-smp, linux-image-4.4.0-1037-aws, linux-image-4.4.0-141-powerpc64-smp, linux-image-4.4.0-141-powerpc64-emb, linux-image-4.4.0-141-powerpc-e500mc, linux-lts-xenial, linux-image-4.4.0-141-lowlatency, linux-image-extra-4.4.0-141-generic, linux-image-4.4.0-141-generic
  • USN-3797-2: linux-aws, linux-image-4.4.0-138-generic, linux-image-4.4.0-138-powerpc64-emb, linux-image-4.4.0-138-lowlatency, linux-image-4.4.0-138-generic-lpae, linux-lts-xenial, linux-image-4.4.0-138-powerpc64-smp, linux-image-extra-4.4.0-138-generic, linux-image-4.4.0-1032-aws, linux-image-4.4.0-138-powerpc-e500mc, linux-image-4.4.0-138-powerpc-smp
  • USN-3797-1: linux-aws, linux-image-4.4.0-1099-raspi2, linux-image-4.4.0-1036-kvm, linux-image-4.4.0-1103-snapdragon, linux-image-4.4.0-138-generic, linux-image-4.4.0-138-powerpc64-emb, linux-kvm, linux-image-4.4.0-1070-aws, linux-image-4.4.0-138-generic-lpae, linux-image-4.4.0-138-lowlatency, linux-snapdragon, linux, linux-raspi2, linux-image-4.4.0-138-powerpc64-smp, linux-image-extra-4.4.0-138-generic, linux-image-4.4.0-138-powerpc-e500mc, linux-image-4.4.0-138-powerpc-smp
  • USN-3835-1: linux-image-4.18.0-1007-raspi2, linux, linux-image-4.18.0-1005-kvm, linux-image-4.18.0-12-lowlatency, linux-kvm, linux-raspi2, linux-image-gcp, linux-gcp, linux-image-4.18.0-12-generic, linux-image-4.18.0-1004-gcp, linux-image-4.18.0-12-snapdragon, linux-image-generic-lpae, linux-image-snapdragon, linux-image-generic, linux-image-lowlatency, linux-image-raspi2, linux-image-gke, linux-image-4.18.0-12-generic-lpae, linux-image-kvm
  • USN-3832-1: linux-aws, linux-image-aws, linux-image-4.18.0-1006-aws
  • USN-3846-1: linux-aws, linux-image-4.18.0-13-generic-lpae, linux-azure, linux-image-aws, linux-image-4.18.0-1007-aws, linux, linux-image-4.18.0-1007-azure, linux-image-4.18.0-1005-gcp, linux-image-4.18.0-1006-kvm, linux-kvm, linux-image-4.18.0-13-lowlatency, linux-image-4.18.0-1008-raspi2, linux-image-azure, linux-raspi2, linux-image-4.18.0-13-generic, linux-image-gcp, linux-gcp, linux-image-generic-lpae, linux-image-4.18.0-13-snapdragon, linux-image-snapdragon, linux-image-generic, linux-image-lowlatency, linux-image-raspi2, linux-image-gke, linux-image-kvm