Ubuntu 18.04 LTS: USN-5418-1 Critical Kernel Security Threats

ubuntu

May 11, 2022

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-azure-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-dell300x: Linux kernel for Dell 300x platforms

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-snapdragon: Linux kernel for Qualcomm 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:

Ke Sun, Alyssa Milburn, Henrique Kawakami, Emma Benoit, Igor Chervatyuk,

Lisa Aichele, and Thais Moreira Hamasaki discovered that the Spectre

Variant 2 mitigations for AMD processors on Linux were insuffic...

Read the Full Advisory

Topics Covered

security advisory denial of service critical Ubuntu kernel information exposure system crash

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1042-dell300x  4.15.0-1042.47
  linux-image-4.15.0-1093-oracle  4.15.0-1093.102
  linux-image-4.15.0-1114-kvm     4.15.0-1114.117
  linux-image-4.15.0-1122-gcp     4.15.0-1122.136
  linux-image-4.15.0-1127-snapdragon  4.15.0-1127.136
  linux-image-4.15.0-1128-aws     4.15.0-1128.137
  linux-image-4.15.0-1138-azure   4.15.0-1138.151
  linux-image-4.15.0-177-generic  4.15.0-177.186
  linux-image-4.15.0-177-generic-lpae  4.15.0-177.186
  linux-image-4.15.0-177-lowlatency  4.15.0-177.186
  linux-image-aws-lts-18.04       4.15.0.1128.131
  linux-image-azure-lts-18.04     4.15.0.1138.111
  linux-image-dell300x            4.15.0.1042.44
  linux-image-gcp-lts-18.04       4.15.0.1122.141
  linux-image-generic             4.15.0.177.166
  linux-image-generic-lpae        4.15.0.177.166
  linux-image-kvm                 4.15.0.1114.110
  linux-image-lowlatency          4.15.0.177.166
  linux-image-oracle-lts-18.04    4.15.0.1093.103
  linux-image-snapdragon          4.15.0.1127.130
  linux-image-virtual             4.15.0.177.166

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1093-oracle  4.15.0-1093.102~16.04.1
  linux-image-4.15.0-1122-gcp     4.15.0-1122.136~16.04.1
  linux-image-4.15.0-1128-aws-hwe  4.15.0-1128.137~16.04.1
  linux-image-4.15.0-1138-azure   4.15.0-1138.151~16.04.1
  linux-image-4.15.0-177-generic  4.15.0-177.186~16.04.1
  linux-image-4.15.0-177-lowlatency  4.15.0-177.186~16.04.1
  linux-image-aws-hwe             4.15.0.1128.118
  linux-image-azure               4.15.0.1138.128
  linux-image-gcp                 4.15.0.1122.123
  linux-image-generic-hwe-16.04   4.15.0.177.169
  linux-image-gke                 4.15.0.1122.123
  linux-image-lowlatency-hwe-16.04  4.15.0.177.169
  linux-image-oem                 4.15.0.177.169
  linux-image-oracle              4.15.0.1093.81
  linux-image-virtual-hwe-16.04   4.15.0.177.169

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1138-azure   4.15.0-1138.151~14.04.1
  linux-image-azure               4.15.0.1138.110

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.