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USN-3404-2: Linux kernel (HWE) vulnerability

28 August 2017

The system could be made to crash under certain conditions.

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Releases

Packages

  • linux-hwe - Linux hardware enablement (HWE) kernel

Details

USN-3404-1 fixed a vulnerability in the Linux kernel for Ubuntu 17.04.
This update provides the corresponding updates for the Linux Hardware
Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS.

A reference count bug was discovered in the Linux kernel ipx protocol
stack. A local attacker could exploit this flaw to cause a denial of
service or possibly other unspecified problems.

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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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Update instructions

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

Ubuntu 16.04

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.

References

Related notices

  • USN-3406-1: linux-image-3.13.0-129-powerpc64-smp, linux-image-extra-3.13.0-129-generic, linux-image-3.13.0-129-powerpc-e500mc, linux-image-3.13.0-129-generic-lpae, linux, linux-image-3.13.0-129-powerpc64-emb, linux-image-3.13.0-129-powerpc-smp, linux-image-3.13.0-129-powerpc-e500, linux-image-3.13.0-129-generic, linux-image-3.13.0-129-lowlatency
  • USN-3344-2: linux-image-4.4.0-83-lowlatency, linux-image-4.4.0-83-powerpc64-emb, linux-lts-xenial, linux-image-4.4.0-83-powerpc-e500mc, linux-image-4.4.0-83-generic-lpae, linux-image-4.4.0-83-powerpc-smp, linux-image-4.4.0-83-powerpc64-smp, linux-image-4.4.0-83-generic, linux-image-extra-4.4.0-83-generic
  • USN-3344-1: linux-image-4.4.0-83-lowlatency, linux-image-4.4.0-83-powerpc64-emb, linux-gke, linux-raspi2, linux-image-4.4.0-83-generic-lpae, linux-image-4.4.0-83-powerpc-e500mc, linux-image-4.4.0-83-powerpc-smp, linux, linux-image-extra-4.4.0-1018-gke, linux-aws, linux-image-extra-4.4.0-83-generic, linux-image-4.4.0-1063-snapdragon, linux-snapdragon, linux-image-4.4.0-1061-raspi2, linux-image-4.4.0-1022-aws, linux-image-4.4.0-83-powerpc64-smp, linux-image-4.4.0-83-generic, linux-image-4.4.0-1018-gke
  • USN-3406-2: linux-image-generic-lts-trusty, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-129-generic, linux-image-3.13.0-129-generic-lpae
  • USN-3404-1: linux-image-4.10.0-33-lowlatency, linux-image-4.10.0-33-generic, linux-image-generic, linux, linux-image-4.10.0-1016-raspi2, linux-image-raspi2, linux-image-lowlatency, linux-image-4.10.0-33-generic-lpae, linux-raspi2, linux-image-generic-lpae

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Further reading