Ubuntu 20.04 & 18.04 Advisory USN-6094-1 Critical: Kernel Issues

ubuntu

May 22, 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-azure: Linux kernel for Microsoft Azure Cloud 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-azure-5.4: Linux kernel for Microsoft Azure cloud 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

Details:

Zheng Wang discovered that the Intel i915 graphics driver in the Linux

kernel did not properly handle certain error conditions, leading to a

double-free. A local attacker could possibly use th...

Read the Full Advisory

Topics Covered

security advisory DoS Ubuntu kernel system update memory exposure type confusion

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1049-ibm      5.4.0-1049.54
   linux-image-5.4.0-1069-gkeop    5.4.0-1069.73
   linux-image-5.4.0-1091-kvm      5.4.0-1091.97
   linux-image-5.4.0-1099-gke      5.4.0-1099.106
   linux-image-5.4.0-1102-aws      5.4.0-1102.110
   linux-image-5.4.0-1105-gcp      5.4.0-1105.114
   linux-image-5.4.0-1108-azure    5.4.0-1108.114
   linux-image-5.4.0-149-generic   5.4.0-149.166
   linux-image-5.4.0-149-generic-lpae  5.4.0-149.166
   linux-image-5.4.0-149-lowlatency  5.4.0-149.166
   linux-image-aws-lts-20.04       5.4.0.1102.99
   linux-image-azure-lts-20.04     5.4.0.1108.101
   linux-image-gcp-lts-20.04       5.4.0.1105.107
   linux-image-generic             5.4.0.149.147
   linux-image-generic-lpae        5.4.0.149.147
   linux-image-gke                 5.4.0.1099.104
   linux-image-gke-5.4             5.4.0.1099.104
   linux-image-gkeop               5.4.0.1069.67
   linux-image-gkeop-5.4           5.4.0.1069.67
   linux-image-ibm                 5.4.0.1049.75
   linux-image-ibm-lts-20.04       5.4.0.1049.75
   linux-image-kvm                 5.4.0.1091.85
   linux-image-lowlatency          5.4.0.149.147
   linux-image-oem                 5.4.0.149.147
   linux-image-oem-osp1            5.4.0.149.147
   linux-image-virtual             5.4.0.149.147

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1049-ibm      5.4.0-1049.54~18.04.1
   linux-image-5.4.0-1105-gcp      5.4.0-1105.114~18.04.1
   linux-image-5.4.0-1108-azure    5.4.0-1108.114~18.04.1
   linux-image-5.4.0-149-generic   5.4.0-149.166~18.04.1
   linux-image-5.4.0-149-generic-lpae  5.4.0-149.166~18.04.1
   linux-image-5.4.0-149-lowlatency  5.4.0-149.166~18.04.1
   linux-image-azure               5.4.0.1108.81
   linux-image-gcp                 5.4.0.1105.81
   linux-image-generic-hwe-18.04   5.4.0.149.166~18.04.120
   linux-image-generic-lpae-hwe-18.04  5.4.0.149.166~18.04.120
   linux-image-ibm                 5.4.0.1049.60
   linux-image-lowlatency-hwe-18.04  5.4.0.149.166~18.04.120
   linux-image-oem                 5.4.0.149.166~18.04.120
   linux-image-oem-osp1            5.4.0.149.166~18.04.120
   linux-image-snapdragon-hwe-18.04  5.4.0.149.166~18.04.120
   linux-image-virtual-hwe-18.04   5.4.0.149.166~18.04.120

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.