Ubuntu 20.04 LTS: 5917-1 Critical Denial Of Service Threats

ubuntu

March 3, 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-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud 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-hwe-5.4: Linux hardware enablement (HWE) kernel

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the Upper Level Protocol (ULP) subsystem in the

Linux kernel did not properly handle sockets entering the LISTEN state in

certain protocols, leading to a use-a...

Read the Full Advisory

Topics Covered

security advisory denial of service security update critical threat kernel flaw ubuntu linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1065-gkeop    5.4.0-1065.69
   linux-image-5.4.0-1087-kvm      5.4.0-1087.93
   linux-image-5.4.0-1094-oracle   5.4.0-1094.103
   linux-image-5.4.0-1095-gke      5.4.0-1095.102
   linux-image-5.4.0-1097-aws      5.4.0-1097.105
   linux-image-5.4.0-1101-gcp      5.4.0-1101.110
   linux-image-5.4.0-1104-azure    5.4.0-1104.110
   linux-image-5.4.0-144-generic   5.4.0-144.161
   linux-image-5.4.0-144-generic-lpae  5.4.0-144.161
   linux-image-5.4.0-144-lowlatency  5.4.0-144.161
   linux-image-aws-lts-20.04       5.4.0.1097.94
   linux-image-azure-lts-20.04     5.4.0.1104.97
   linux-image-gcp-lts-20.04       5.4.0.1101.103
   linux-image-generic             5.4.0.144.142
   linux-image-generic-lpae        5.4.0.144.142
   linux-image-gke                 5.4.0.1095.100
   linux-image-gke-5.4             5.4.0.1095.100
   linux-image-gkeop               5.4.0.1065.63
   linux-image-gkeop-5.4           5.4.0.1065.63
   linux-image-kvm                 5.4.0.1087.81
   linux-image-lowlatency          5.4.0.144.142
   linux-image-oem                 5.4.0.144.142
   linux-image-oem-osp1            5.4.0.144.142
   linux-image-oracle-lts-20.04    5.4.0.1094.87
   linux-image-virtual             5.4.0.144.142

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1094-oracle   5.4.0-1094.103~18.04.1
   linux-image-5.4.0-1097-aws      5.4.0-1097.105~18.04.1
   linux-image-5.4.0-1104-azure    5.4.0-1104.110~18.04.1
   linux-image-5.4.0-144-generic   5.4.0-144.161~18.04.1
   linux-image-5.4.0-144-generic-lpae  5.4.0-144.161~18.04.1
   linux-image-5.4.0-144-lowlatency  5.4.0-144.161~18.04.1
   linux-image-aws                 5.4.0.1097.75
   linux-image-azure               5.4.0.1104.77
   linux-image-generic-hwe-18.04   5.4.0.144.161~18.04.115
   linux-image-generic-lpae-hwe-18.04  5.4.0.144.161~18.04.115
   linux-image-lowlatency-hwe-18.04  5.4.0.144.161~18.04.115
   linux-image-oem                 5.4.0.144.161~18.04.115
   linux-image-oem-osp1            5.4.0.144.161~18.04.115
   linux-image-oracle              5.4.0.1094.103~18.04.68
   linux-image-snapdragon-hwe-18.04  5.4.0.144.161~18.04.115
   linux-image-virtual-hwe-18.04   5.4.0.144.161~18.04.115

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.