Ubuntu 20.04, 18.04 USN-5691-1 Critical: Kernel DoS and Code Execution

ubuntu

October 19, 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-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: Li...

Read the Full Advisory

Topics Covered

security advisory denial of service critical Ubuntu kernel 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-5.4.0-1036-ibm      5.4.0-1036.41
   linux-image-5.4.0-1049-bluefield  5.4.0-1049.55
   linux-image-5.4.0-1056-gkeop    5.4.0-1056.60
   linux-image-5.4.0-1073-raspi    5.4.0-1073.84
   linux-image-5.4.0-1078-kvm      5.4.0-1078.84
   linux-image-5.4.0-1086-gke      5.4.0-1086.93
   linux-image-5.4.0-1086-oracle   5.4.0-1086.95
   linux-image-5.4.0-1088-aws      5.4.0-1088.96
   linux-image-5.4.0-1092-gcp      5.4.0-1092.101
   linux-image-5.4.0-1094-azure    5.4.0-1094.100
   linux-image-5.4.0-131-generic   5.4.0-131.147
   linux-image-5.4.0-131-generic-lpae  5.4.0-131.147
   linux-image-5.4.0-131-lowlatency  5.4.0-131.147
   linux-image-aws-lts-20.04       5.4.0.1088.87
   linux-image-azure-lts-20.04     5.4.0.1094.90
   linux-image-bluefield           5.4.0.1049.47
   linux-image-gcp-lts-20.04       5.4.0.1092.96
   linux-image-generic             5.4.0.131.131
   linux-image-generic-lpae        5.4.0.131.131
   linux-image-gke                 5.4.0.1086.93
   linux-image-gke-5.4             5.4.0.1086.93
   linux-image-gkeop               5.4.0.1056.56
   linux-image-gkeop-5.4           5.4.0.1056.56
   linux-image-ibm                 5.4.0.1036.64
   linux-image-ibm-lts-20.04       5.4.0.1036.64
   linux-image-kvm                 5.4.0.1078.74
   linux-image-lowlatency          5.4.0.131.131
   linux-image-oem                 5.4.0.131.131
   linux-image-oem-osp1            5.4.0.131.131
   linux-image-oracle-lts-20.04    5.4.0.1086.82
   linux-image-raspi               5.4.0.1073.105
   linux-image-raspi2              5.4.0.1073.105
   linux-image-virtual             5.4.0.131.131

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1036-ibm      5.4.0-1036.41~18.04.1
   linux-image-5.4.0-1073-raspi    5.4.0-1073.84~18.04.1
   linux-image-5.4.0-1086-oracle   5.4.0-1086.95~18.04.1
   linux-image-5.4.0-1088-aws      5.4.0-1088.96~18.04.1
   linux-image-5.4.0-1092-gcp      5.4.0-1092.101~18.04.1
   linux-image-5.4.0-1094-azure    5.4.0-1094.100~18.04.1
   linux-image-5.4.0-131-generic   5.4.0-131.147~18.04.1
   linux-image-5.4.0-131-generic-lpae  5.4.0-131.147~18.04.1
   linux-image-5.4.0-131-lowlatency  5.4.0-131.147~18.04.1
   linux-image-aws                 5.4.0.1088.67
   linux-image-azure               5.4.0.1094.70
   linux-image-gcp                 5.4.0.1092.70
   linux-image-generic-hwe-18.04   5.4.0.131.147~18.04.108
   linux-image-generic-lpae-hwe-18.04  5.4.0.131.147~18.04.108
   linux-image-ibm                 5.4.0.1036.49
   linux-image-lowlatency-hwe-18.04  5.4.0.131.147~18.04.108
   linux-image-oem                 5.4.0.131.147~18.04.108
   linux-image-oem-osp1            5.4.0.131.147~18.04.108
   linux-image-oracle              5.4.0.1086.95~18.04.62
   linux-image-raspi-hwe-18.04     5.4.0.1073.72
   linux-image-snapdragon-hwe-18.04  5.4.0.131.147~18.04.108
   linux-image-virtual-hwe-18.04   5.4.0.131.147~18.04.108

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.