Ubuntu 16.04 LTS: USN-4145-1 Critical: Kernel Security Fixes

ubuntu

October 1, 2019

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-kvm: Linux kernel for cloud environments

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

It was discovered that a race condition existed in the GFS2 file system in

the Linux kernel. A local attacker could possibly use this to cause a

denial of service (system crash). (CVE-2016-10905)

It was discovered that the IPv6 implementation in the Linux kernel did not

properly validate socket options in some situations. A local attacker could

use this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2017-18509)

It was discovered that the USB gadget Midi driver in the Linux kernel

contained a double-free vulnerability when handling certain error

conditions. A local attacker could use this to cause a denial of service

(...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel ubuntu system crash linux

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1059-kvm      4.4.0-1059.66
  linux-image-4.4.0-1095-aws      4.4.0-1095.106
  linux-image-4.4.0-1123-raspi2   4.4.0-1123.132
  linux-image-4.4.0-1127-snapdragon  4.4.0-1127.135
  linux-image-4.4.0-165-generic   4.4.0-165.193
  linux-image-4.4.0-165-generic-lpae  4.4.0-165.193
  linux-image-4.4.0-165-lowlatency  4.4.0-165.193
  linux-image-4.4.0-165-powerpc-e500mc  4.4.0-165.193
  linux-image-4.4.0-165-powerpc-smp  4.4.0-165.193
  linux-image-4.4.0-165-powerpc64-emb  4.4.0-165.193
  linux-image-4.4.0-165-powerpc64-smp  4.4.0-165.193
  linux-image-aws                 4.4.0.1095.99
  linux-image-generic             4.4.0.165.173
  linux-image-generic-lpae        4.4.0.165.173
  linux-image-kvm                 4.4.0.1059.59
  linux-image-lowlatency          4.4.0.165.173
  linux-image-powerpc-e500mc      4.4.0.165.173
  linux-image-powerpc-smp         4.4.0.165.173
  linux-image-powerpc64-emb       4.4.0.165.173
  linux-image-powerpc64-smp       4.4.0.165.173
  linux-image-raspi2              4.4.0.1123.123
  linux-image-snapdragon          4.4.0.1127.119
  linux-image-virtual             4.4.0.165.173

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.