Ubuntu 20.04 LTS USN-5791-1: Critical Kernel Issues and Threats

ubuntu

January 6, 2023

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-gcp: Linux kernel for Google Cloud Platform (GCP) 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-raspi: Linux kernel for Raspberry Pi systems

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

- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) 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

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

It was discovered that a race...

Read the Full Advisory

Topics Covered

security advisory denial of service critical kernel system update ubuntu use after free

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1041-ibm      5.4.0-1041.46
   linux-image-5.4.0-1061-gkeop    5.4.0-1061.65
   linux-image-5.4.0-1078-raspi    5.4.0-1078.89
   linux-image-5.4.0-1083-kvm      5.4.0-1083.89
   linux-image-5.4.0-1091-gke      5.4.0-1091.98
   linux-image-5.4.0-1091-oracle   5.4.0-1091.100
   linux-image-5.4.0-1093-aws      5.4.0-1093.101
   linux-image-5.4.0-1097-gcp      5.4.0-1097.106
   linux-image-5.4.0-136-generic   5.4.0-136.153
   linux-image-5.4.0-136-generic-lpae  5.4.0-136.153
   linux-image-5.4.0-136-lowlatency  5.4.0-136.153
   linux-image-aws-lts-20.04       5.4.0.1093.90
   linux-image-gcp-lts-20.04       5.4.0.1097.99
   linux-image-generic             5.4.0.136.134
   linux-image-generic-lpae        5.4.0.136.134
   linux-image-gke                 5.4.0.1091.96
   linux-image-gke-5.4             5.4.0.1091.96
   linux-image-gkeop               5.4.0.1061.59
   linux-image-gkeop-5.4           5.4.0.1061.59
   linux-image-ibm                 5.4.0.1041.67
   linux-image-ibm-lts-20.04       5.4.0.1041.67
   linux-image-kvm                 5.4.0.1083.77
   linux-image-lowlatency          5.4.0.136.134
   linux-image-oem                 5.4.0.136.134
   linux-image-oem-osp1            5.4.0.136.134
   linux-image-oracle-lts-20.04    5.4.0.1091.84
   linux-image-raspi               5.4.0.1078.108
   linux-image-raspi2              5.4.0.1078.108
   linux-image-virtual             5.4.0.136.134

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1041-ibm      5.4.0-1041.46~18.04.1
   linux-image-5.4.0-1078-raspi    5.4.0-1078.89~18.04.1
   linux-image-5.4.0-1091-oracle   5.4.0-1091.100~18.04.1
   linux-image-5.4.0-1093-aws      5.4.0-1093.102~18.04.2
   linux-image-5.4.0-1097-gcp      5.4.0-1097.106~18.04.1
   linux-image-5.4.0-136-generic   5.4.0-136.153~18.04.1
   linux-image-5.4.0-136-generic-lpae  5.4.0-136.153~18.04.1
   linux-image-5.4.0-136-lowlatency  5.4.0-136.153~18.04.1
   linux-image-aws                 5.4.0.1093.71
   linux-image-gcp                 5.4.0.1097.73
   linux-image-generic-hwe-18.04   5.4.0.136.153~18.04.111
   linux-image-generic-lpae-hwe-18.04  5.4.0.136.153~18.04.111
   linux-image-ibm                 5.4.0.1041.52
   linux-image-lowlatency-hwe-18.04  5.4.0.136.153~18.04.111
   linux-image-oem                 5.4.0.136.153~18.04.111
   linux-image-oem-osp1            5.4.0.136.153~18.04.111
   linux-image-oracle              5.4.0.1091.100~18.04.65
   linux-image-raspi-hwe-18.04     5.4.0.1078.75
   linux-image-snapdragon-hwe-18.04  5.4.0.136.153~18.04.111
   linux-image-virtual-hwe-18.04   5.4.0.136.153~18.04.111

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.