Ubuntu 18.04 LTS: USN-4287-1 Critical: Linux Kernel Denial of Service

ubuntu

February 18, 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-gke-4.15: Linux kernel for Google Container Engine (GKE) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

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

Details:

It was discovered that the Linux kernel did not properly clear data

structures on context switches for certain Intel graphics processors. A

local attacker could use this to expose sensitive information.

(CVE-2019-14615)

It was discovered that the Atheros 802.11ac wireless USB device d...

Read the Full Advisory

Topics Covered

security advisory Ubuntu memory management information exposure service disruption Linux kernel

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1033-oracle  4.15.0-1033.36
  linux-image-4.15.0-1052-gke     4.15.0-1052.55
  linux-image-4.15.0-1053-kvm     4.15.0-1053.53
  linux-image-4.15.0-1055-raspi2  4.15.0-1055.59
  linux-image-4.15.0-1060-aws     4.15.0-1060.62
  linux-image-4.15.0-1072-snapdragon  4.15.0-1072.79
  linux-image-4.15.0-88-generic   4.15.0-88.88
  linux-image-4.15.0-88-generic-lpae  4.15.0-88.88
  linux-image-4.15.0-88-lowlatency  4.15.0-88.88
  linux-image-aws                 4.15.0.1060.61
  linux-image-aws-lts-18.04       4.15.0.1060.61
  linux-image-generic             4.15.0.88.80
  linux-image-generic-lpae        4.15.0.88.80
  linux-image-gke                 4.15.0.1052.56
  linux-image-gke-4.15            4.15.0.1052.56
  linux-image-kvm                 4.15.0.1053.53
  linux-image-lowlatency          4.15.0.88.80
  linux-image-oracle              4.15.0.1033.38
  linux-image-oracle-lts-18.04    4.15.0.1033.38
  linux-image-powerpc-e500mc      4.15.0.88.80
  linux-image-powerpc-smp         4.15.0.88.80
  linux-image-powerpc64-emb       4.15.0.88.80
  linux-image-powerpc64-smp       4.15.0.88.80
  linux-image-raspi2              4.15.0.1055.53
  linux-image-snapdragon          4.15.0.1072.75
  linux-image-virtual             4.15.0.88.80

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1033-oracle  4.15.0-1033.36~16.04.1
  linux-image-4.15.0-1055-gcp     4.15.0-1055.59
  linux-image-4.15.0-1060-aws     4.15.0-1060.62~16.04.1
  linux-image-4.15.0-1071-azure   4.15.0-1071.76
  linux-image-4.15.0-88-generic   4.15.0-88.88~16.04.1
  linux-image-4.15.0-88-generic-lpae  4.15.0-88.88~16.04.1
  linux-image-4.15.0-88-lowlatency  4.15.0-88.88~16.04.1
  linux-image-aws-hwe             4.15.0.1060.60
  linux-image-azure               4.15.0.1071.74
  linux-image-gcp                 4.15.0.1055.69
  linux-image-generic-hwe-16.04   4.15.0.88.98
  linux-image-generic-lpae-hwe-16.04  4.15.0.88.98
  linux-image-gke                 4.15.0.1055.69
  linux-image-lowlatency-hwe-16.04  4.15.0.88.98
  linux-image-oem                 4.15.0.88.98
  linux-image-oracle              4.15.0.1033.26
  linux-image-virtual-hwe-16.04   4.15.0.88.98

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.