Ubuntu 20.04 LTS USN-6726-1 Critical: Kernel Crash Threat

ubuntu

April 9, 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

- 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 kernel fo...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel update Ubuntu memory exhaustion system crash Linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1069-ibm      5.4.0-1069.74
   linux-image-5.4.0-1082-bluefield  5.4.0-1082.89
   linux-image-5.4.0-1089-gkeop    5.4.0-1089.93
   linux-image-5.4.0-1106-raspi    5.4.0-1106.118
   linux-image-5.4.0-1110-kvm      5.4.0-1110.117
   linux-image-5.4.0-1121-oracle   5.4.0-1121.130
   linux-image-5.4.0-1122-aws      5.4.0-1122.132
   linux-image-5.4.0-1126-gcp      5.4.0-1126.135
   linux-image-5.4.0-1127-azure    5.4.0-1127.134
   linux-image-5.4.0-176-generic   5.4.0-176.196
   linux-image-5.4.0-176-generic-lpae  5.4.0-176.196
   linux-image-5.4.0-176-lowlatency  5.4.0-176.196
   linux-image-aws-lts-20.04       5.4.0.1122.119
   linux-image-azure-lts-20.04     5.4.0.1127.121
   linux-image-bluefield           5.4.0.1082.78
   linux-image-gcp-lts-20.04       5.4.0.1126.128
   linux-image-generic             5.4.0.176.174
   linux-image-generic-lpae        5.4.0.176.174
   linux-image-gkeop               5.4.0.1089.87
   linux-image-gkeop-5.4           5.4.0.1089.87
   linux-image-ibm-lts-20.04       5.4.0.1069.98
   linux-image-kvm                 5.4.0.1110.106
   linux-image-lowlatency          5.4.0.176.174
   linux-image-oem                 5.4.0.176.174
   linux-image-oem-osp1            5.4.0.176.174
   linux-image-oracle-lts-20.04    5.4.0.1121.114
   linux-image-raspi               5.4.0.1106.136
   linux-image-raspi2              5.4.0.1106.136
   linux-image-virtual             5.4.0.176.174

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1069-ibm      5.4.0-1069.74~18.04.1
   linux-image-5.4.0-1106-raspi    5.4.0-1106.118~18.04.1
   linux-image-5.4.0-1121-oracle   5.4.0-1121.130~18.04.1
   linux-image-5.4.0-1122-aws      5.4.0-1122.132~18.04.1
   linux-image-5.4.0-1126-gcp      5.4.0-1126.135~18.04.1
   linux-image-5.4.0-1127-azure    5.4.0-1127.134~18.04.1
   linux-image-5.4.0-175-generic   5.4.0-175.195~18.04.1
   linux-image-5.4.0-175-lowlatency  5.4.0-175.195~18.04.1
   linux-image-aws                 5.4.0.1122.132~18.04.1
   linux-image-azure               5.4.0.1127.134~18.04.1
   linux-image-gcp                 5.4.0.1126.135~18.04.1
   linux-image-generic-hwe-18.04   5.4.0.175.195~18.04.1
   linux-image-ibm                 5.4.0.1069.79
   linux-image-lowlatency-hwe-18.04  5.4.0.175.195~18.04.1
   linux-image-oem                 5.4.0.175.195~18.04.1
   linux-image-oem-osp1            5.4.0.175.195~18.04.1
   linux-image-oracle              5.4.0.1121.130~18.04.1
   linux-image-raspi-hwe-18.04     5.4.0.1106.103
   linux-image-snapdragon-hwe-18.04  5.4.0.175.195~18.04.1
   linux-image-virtual-hwe-18.04   5.4.0.175.195~18.04.1

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.