Ubuntu 20.04 & 18.04: USN-5338-1 Critical Kernel Security Issues

ubuntu

March 22, 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: Linux kernel for Microsoft Azure Cloud systems

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems

- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

- linux-ibm-5.4: Linux kernel for IBM cloud systems

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the

Linux kernel did not properly restrict access to the cgroups v1

release_a...

Read the Full Advisory

Topics Covered

security advisory denial of service critical issue local exploit kernel system update ubuntu

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1018-ibm      5.4.0-1018.20
  linux-image-5.4.0-1037-gkeop    5.4.0-1037.38
  linux-image-5.4.0-105-generic   5.4.0-105.119
  linux-image-5.4.0-105-generic-lpae  5.4.0-105.119
  linux-image-5.4.0-105-lowlatency  5.4.0-105.119
  linux-image-5.4.0-1059-kvm      5.4.0-1059.62
  linux-image-5.4.0-1066-gke      5.4.0-1066.69
  linux-image-5.4.0-1067-oracle   5.4.0-1067.72
  linux-image-5.4.0-1069-aws      5.4.0-1069.73
  linux-image-5.4.0-1073-azure    5.4.0-1073.76
  linux-image-aws-lts-20.04       5.4.0.1069.71
  linux-image-azure-lts-20.04     5.4.0.1073.71
  linux-image-generic             5.4.0.105.109
  linux-image-generic-lpae        5.4.0.105.109
  linux-image-gke                 5.4.0.1066.76
  linux-image-gke-5.4             5.4.0.1066.76
  linux-image-gkeop               5.4.0.1037.40
  linux-image-gkeop-5.4           5.4.0.1037.40
  linux-image-ibm                 5.4.0.1018.18
  linux-image-ibm-lts-20.04       5.4.0.1018.18
  linux-image-kvm                 5.4.0.1059.58
  linux-image-lowlatency          5.4.0.105.109
  linux-image-oem                 5.4.0.105.109
  linux-image-oem-osp1            5.4.0.105.109
  linux-image-oracle-lts-20.04    5.4.0.1067.67
  linux-image-virtual             5.4.0.105.109

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1018-ibm      5.4.0-1018.20~18.04.1
  linux-image-5.4.0-105-generic   5.4.0-105.119~18.04.1
  linux-image-5.4.0-105-generic-lpae  5.4.0-105.119~18.04.1
  linux-image-5.4.0-105-lowlatency  5.4.0-105.119~18.04.1
  linux-image-5.4.0-1067-oracle   5.4.0-1067.72~18.04.1
  linux-image-5.4.0-1069-aws      5.4.0-1069.73~18.04.1
  linux-image-5.4.0-1073-azure    5.4.0-1073.76~18.04.1
  linux-image-aws                 5.4.0.1069.51
  linux-image-azure               5.4.0.1073.52
  linux-image-generic-hwe-18.04   5.4.0.105.119~18.04.90
  linux-image-generic-lpae-hwe-18.04  5.4.0.105.119~18.04.90
  linux-image-ibm                 5.4.0.1018.35
  linux-image-lowlatency-hwe-18.04  5.4.0.105.119~18.04.90
  linux-image-oem                 5.4.0.105.119~18.04.90
  linux-image-oem-osp1            5.4.0.105.119~18.04.90
  linux-image-oracle              5.4.0.1067.72~18.04.46
  linux-image-snapdragon-hwe-18.04  5.4.0.105.119~18.04.90
  linux-image-virtual-hwe-18.04   5.4.0.105.119~18.04.90

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.