Ubuntu 20.04: USN-7003-1 Critical: Linux Kernel DoS Risk

ubuntu

September 12, 2024

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

Details:

It was discovered that the JFS file system contained an out-of-bounds read

vulnerability when printing xattr debug information. A local attacker could

use this to cause a denial of service (system crash). (CVE-2024-40902)

Several security issues were discovered in the Linux kernel.

An attacker could possibly use these to compromise the system.

This update corrects flaws in the following subsystems:

- M...

Read the Full Advisory

Topics Covered

security advisory denial of service critical system update ubuntu security issues linux kernel

Update Instructions

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

Ubuntu 20.04 LTS
  linux-image-5.4.0-1079-ibm      5.4.0-1079.84
  linux-image-5.4.0-1092-bluefield  5.4.0-1092.99
  linux-image-5.4.0-1099-gkeop    5.4.0-1099.103
  linux-image-5.4.0-1120-kvm      5.4.0-1120.128
  linux-image-5.4.0-1131-oracle   5.4.0-1131.140
  linux-image-5.4.0-1132-aws      5.4.0-1132.142
  linux-image-5.4.0-1136-gcp      5.4.0-1136.145
  linux-image-5.4.0-1137-azure    5.4.0-1137.144
  linux-image-5.4.0-195-generic   5.4.0-195.215
  linux-image-5.4.0-195-generic-lpae  5.4.0-195.215
  linux-image-5.4.0-195-lowlatency  5.4.0-195.215
  linux-image-aws-lts-20.04       5.4.0.1132.129
  linux-image-azure-lts-20.04     5.4.0.1137.131
  linux-image-bluefield           5.4.0.1092.88
  linux-image-gcp-lts-20.04       5.4.0.1136.138
  linux-image-generic             5.4.0.195.193
  linux-image-generic-lpae        5.4.0.195.193
  linux-image-gkeop               5.4.0.1099.97
  linux-image-gkeop-5.4           5.4.0.1099.97
  linux-image-ibm-lts-20.04       5.4.0.1079.108
  linux-image-kvm                 5.4.0.1120.116
  linux-image-lowlatency          5.4.0.195.193
  linux-image-oem                 5.4.0.195.193
  linux-image-oem-osp1            5.4.0.195.193
  linux-image-oracle-lts-20.04    5.4.0.1131.124
  linux-image-virtual             5.4.0.195.193

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.