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

28 August 2017

linux-hwe vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.04 LTS

Summary

The system could be made to crash under certain conditions.

Software Description

  • 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.

Update instructions

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

Ubuntu 16.04 LTS
linux-image-4.10.0-33-generic - 4.10.0-33.37~16.04.1
linux-image-4.10.0-33-generic-lpae - 4.10.0-33.37~16.04.1
linux-image-4.10.0-33-lowlatency - 4.10.0-33.37~16.04.1
linux-image-generic-hwe-16.04 - 4.10.0.33.35
linux-image-generic-lpae-hwe-16.04 - 4.10.0.33.35
linux-image-lowlatency-hwe-16.04 - 4.10.0.33.35

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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