Ubuntu 20.04 LTS: USN-6027-1 Critical: Kernel Denial of Service Issues

ubuntu

April 19, 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-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-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 kern...

Read the Full Advisory

Topics Covered

security advisory denial of service critical Ubuntu kernel system update memory

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1047-ibm      5.4.0-1047.52
   linux-image-5.4.0-1067-gkeop    5.4.0-1067.71
   linux-image-5.4.0-1083-raspi    5.4.0-1083.94
   linux-image-5.4.0-1089-kvm      5.4.0-1089.95
   linux-image-5.4.0-1097-gke      5.4.0-1097.104
   linux-image-5.4.0-1099-oracle   5.4.0-1099.108
   linux-image-5.4.0-1100-aws      5.4.0-1100.108
   linux-image-5.4.0-1103-gcp      5.4.0-1103.112
   linux-image-5.4.0-1106-azure    5.4.0-1106.112
   linux-image-5.4.0-147-generic   5.4.0-147.164
   linux-image-5.4.0-147-generic-lpae  5.4.0-147.164
   linux-image-5.4.0-147-lowlatency  5.4.0-147.164
   linux-image-aws-lts-20.04       5.4.0.1100.97
   linux-image-azure-lts-20.04     5.4.0.1106.99
   linux-image-gcp-lts-20.04       5.4.0.1103.105
   linux-image-generic             5.4.0.147.145
   linux-image-generic-lpae        5.4.0.147.145
   linux-image-gke                 5.4.0.1097.102
   linux-image-gke-5.4             5.4.0.1097.102
   linux-image-gkeop               5.4.0.1067.65
   linux-image-gkeop-5.4           5.4.0.1067.65
   linux-image-ibm                 5.4.0.1047.73
   linux-image-ibm-lts-20.04       5.4.0.1047.73
   linux-image-kvm                 5.4.0.1089.83
   linux-image-lowlatency          5.4.0.147.145
   linux-image-oem                 5.4.0.147.145
   linux-image-oem-osp1            5.4.0.147.145
   linux-image-oracle-lts-20.04    5.4.0.1099.92
   linux-image-raspi               5.4.0.1083.113
   linux-image-raspi2              5.4.0.1083.113
   linux-image-virtual             5.4.0.147.145

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1047-ibm      5.4.0-1047.52~18.04.1
   linux-image-5.4.0-1083-raspi    5.4.0-1083.94~18.04.1
   linux-image-5.4.0-1099-oracle   5.4.0-1099.108~18.04.1
   linux-image-5.4.0-1100-aws      5.4.0-1100.108~18.04.1
   linux-image-5.4.0-1103-gcp      5.4.0-1103.112~18.04.1
   linux-image-5.4.0-1106-azure    5.4.0-1106.112~18.04.1
   linux-image-5.4.0-147-generic   5.4.0-147.164~18.04.1
   linux-image-5.4.0-147-generic-lpae  5.4.0-147.164~18.04.1
   linux-image-5.4.0-147-lowlatency  5.4.0-147.164~18.04.1
   linux-image-aws                 5.4.0.1100.78
   linux-image-azure               5.4.0.1106.79
   linux-image-gcp                 5.4.0.1103.79
   linux-image-generic-hwe-18.04   5.4.0.147.164~18.04.118
   linux-image-generic-lpae-hwe-18.04  5.4.0.147.164~18.04.118
   linux-image-ibm                 5.4.0.1047.58
   linux-image-lowlatency-hwe-18.04  5.4.0.147.164~18.04.118
   linux-image-oem                 5.4.0.147.164~18.04.118
   linux-image-oem-osp1            5.4.0.147.164~18.04.118
   linux-image-oracle              5.4.0.1099.108~18.04.71
   linux-image-raspi-hwe-18.04     5.4.0.1083.80
   linux-image-snapdragon-hwe-18.04  5.4.0.147.164~18.04.118
   linux-image-virtual-hwe-18.04   5.4.0.147.164~18.04.118

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.