Ubuntu 16.04 LTS: USN-4346-1 High: Linux Kernel Denial Of Service

ubuntu

April 28, 2020

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- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

It was discovered that the QLogic Fibre Channel driver in the Linux kernel

did not properly check for error, leading to a NULL pointer dereference. A

local attacker could possibly use this to cause a denial of service (system

crash). (CVE-2019-16233)

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not

properly check for errors in some situations. A local attacker could

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

(CVE-2019-16234)

Tristan Madani discovered that the block I/O tracing implementation in the

Linux kernel contained a race conditio...

Read the Full Advisory

Topics Covered

security advisory denial of service bug fix ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1070-kvm      4.4.0-1070.77
  linux-image-4.4.0-1106-aws      4.4.0-1106.117
  linux-image-4.4.0-1132-raspi2   4.4.0-1132.141
  linux-image-4.4.0-1136-snapdragon  4.4.0-1136.144
  linux-image-4.4.0-178-generic   4.4.0-178.208
  linux-image-4.4.0-178-generic-lpae  4.4.0-178.208
  linux-image-4.4.0-178-lowlatency  4.4.0-178.208
  linux-image-4.4.0-178-powerpc-e500mc  4.4.0-178.208
  linux-image-4.4.0-178-powerpc-smp  4.4.0-178.208
  linux-image-4.4.0-178-powerpc64-emb  4.4.0-178.208
  linux-image-4.4.0-178-powerpc64-smp  4.4.0-178.208
  linux-image-aws                 4.4.0.1106.110
  linux-image-generic             4.4.0.178.186
  linux-image-generic-lpae        4.4.0.178.186
  linux-image-kvm                 4.4.0.1070.70
  linux-image-lowlatency          4.4.0.178.186
  linux-image-powerpc-e500mc      4.4.0.178.186
  linux-image-powerpc-smp         4.4.0.178.186
  linux-image-powerpc64-emb       4.4.0.178.186
  linux-image-powerpc64-smp       4.4.0.178.186
  linux-image-raspi2              4.4.0.1132.132
  linux-image-snapdragon          4.4.0.1136.128
  linux-image-virtual             4.4.0.178.186

Ubuntu 14.04 ESM:
  linux-image-4.4.0-1066-aws      4.4.0-1066.70
  linux-image-4.4.0-178-generic   4.4.0-178.208~14.04.1
  linux-image-4.4.0-178-lowlatency  4.4.0-178.208~14.04.1
  linux-image-aws                 4.4.0.1066.67
  linux-image-generic-lts-xenial  4.4.0.178.157
  linux-image-lowlatency-lts-xenial  4.4.0.178.157
  linux-image-virtual-lts-xenial  4.4.0.178.157

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.