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USN-3762-1: Linux kernel vulnerabilities

11 September 2018

Several security issues were fixed in the Linux kernel.

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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.

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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-raspi2 - Linux kernel for Raspberry Pi 2

Details

It was discovered that the VirtIO subsystem in the Linux kernel did not
properly initialize memory in some situations. A local attacker could use
this to possibly expose sensitive information (kernel memory).
(CVE-2018-1118)

Seunghun Han discovered an information leak in the ACPI handling code in
the Linux kernel when handling early termination of ACPI table loading. A
local attacker could use this to expose sensitive informal (kernel address
locations). (CVE-2017-13695)

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-3762-2: linux-image-4.15.0-34-generic, linux-image-unsigned-4.15.0-1023-azure, linux-image-unsigned-4.15.0-34-generic, linux-gcp, linux-image-4.15.0-34-generic-lpae, linux-hwe, linux-image-unsigned-4.15.0-1019-gcp, linux-image-unsigned-4.15.0-34-lowlatency, linux-image-4.15.0-34-lowlatency, linux-azure
  • USN-3696-2: linux-image-4.4.0-130-lowlatency, linux-image-4.4.0-130-powerpc-smp, linux-image-extra-4.4.0-130-generic, linux-aws, linux-image-4.4.0-130-generic, linux-image-4.4.0-130-generic-lpae, linux-image-4.4.0-130-powerpc64-emb, linux-lts-xenial, linux-image-4.4.0-130-powerpc64-smp, linux-image-4.4.0-1024-aws, linux-image-4.4.0-130-powerpc-e500mc
  • USN-3696-1: linux-image-4.4.0-1095-snapdragon, linux-image-4.4.0-130-lowlatency, linux-raspi2, linux-image-4.4.0-1062-aws, linux-image-4.4.0-130-powerpc-smp, linux-image-extra-4.4.0-130-generic, linux-aws, linux-image-4.4.0-130-generic, linux-image-4.4.0-130-generic-lpae, linux-image-4.4.0-130-powerpc64-emb, linux-kvm, linux-snapdragon, linux-image-4.4.0-1092-raspi2, linux, linux-image-4.4.0-130-powerpc64-smp, linux-image-4.4.0-1029-kvm, linux-image-4.4.0-130-powerpc-e500mc