Ubuntu 20.04 LTS USN-5622-1 Critical: Kernel Security Issues

ubuntu

September 21, 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-bluefield: Linux kernel for NVIDIA BlueField platforms

- 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-raspi: Linux kernel for Raspberry Pi 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:

It was discovered that the framebuffer driver on the Linux kernel did not

verify size limits when changing font or screen...

Read the Full Advisory

Topics Covered

security advisory denial of service security issue update Ubuntu kernel system crash

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1033-ibm      5.4.0-1033.37
  linux-image-5.4.0-1046-bluefield  5.4.0-1046.51
  linux-image-5.4.0-1053-gkeop    5.4.0-1053.56
  linux-image-5.4.0-1070-raspi    5.4.0-1070.80
  linux-image-5.4.0-1075-kvm      5.4.0-1075.80
  linux-image-5.4.0-1083-oracle   5.4.0-1083.91
  linux-image-5.4.0-1085-aws      5.4.0-1085.92
  linux-image-5.4.0-1091-azure    5.4.0-1091.96
  linux-image-5.4.0-126-generic   5.4.0-126.142
  linux-image-5.4.0-126-generic-lpae  5.4.0-126.142
  linux-image-5.4.0-126-lowlatency  5.4.0-126.142
  linux-image-aws-lts-20.04       5.4.0.1085.85
  linux-image-azure-lts-20.04     5.4.0.1091.88
  linux-image-bluefield           5.4.0.1046.45
  linux-image-generic             5.4.0.126.127
  linux-image-generic-lpae        5.4.0.126.127
  linux-image-gkeop               5.4.0.1053.54
  linux-image-gkeop-5.4           5.4.0.1053.54
  linux-image-ibm                 5.4.0.1033.62
  linux-image-ibm-lts-20.04       5.4.0.1033.62
  linux-image-kvm                 5.4.0.1075.72
  linux-image-lowlatency          5.4.0.126.127
  linux-image-oem                 5.4.0.126.127
  linux-image-oem-osp1            5.4.0.126.127
  linux-image-oracle-lts-20.04    5.4.0.1083.80
  linux-image-raspi               5.4.0.1070.103
  linux-image-raspi2              5.4.0.1070.103
  linux-image-virtual             5.4.0.126.127

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1033-ibm      5.4.0-1033.37~18.04.1
  linux-image-5.4.0-1083-oracle   5.4.0-1083.91~18.04.1
  linux-image-5.4.0-1085-aws      5.4.0-1085.92~18.04.1
  linux-image-5.4.0-1091-azure    5.4.0-1091.96~18.04.1
  linux-image-5.4.0-126-generic   5.4.0-126.142~18.04.1
  linux-image-5.4.0-126-generic-lpae  5.4.0-126.142~18.04.1
  linux-image-5.4.0-126-lowlatency  5.4.0-126.142~18.04.1
  linux-image-aws                 5.4.0.1085.65
  linux-image-azure               5.4.0.1091.68
  linux-image-generic-hwe-18.04   5.4.0.126.142~18.04.106
  linux-image-generic-lpae-hwe-18.04  5.4.0.126.142~18.04.106
  linux-image-ibm                 5.4.0.1033.47
  linux-image-lowlatency-hwe-18.04  5.4.0.126.142~18.04.106
  linux-image-oem                 5.4.0.126.142~18.04.106
  linux-image-oem-osp1            5.4.0.126.142~18.04.106
  linux-image-oracle              5.4.0.1083.91~18.04.60
  linux-image-snapdragon-hwe-18.04  5.4.0.126.142~18.04.106
  linux-image-virtual-hwe-18.04   5.4.0.126.142~18.04.106

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.