Ubuntu 18.04 LTS USN-5298-1 Critical: Kernel Denial Of Service

ubuntu

February 22, 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-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-dell300x: Linux kernel for Dell 300x platforms

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors

- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Packet network protocol implementation in the

Linux kernel contained a double-free vulnerability. A local attacker could

use this to cause a denial of servi...

Read the Full Advisory

Topics Covered

security advisory denial of service critical ubuntu system crash linux updates linux kernel

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1035-dell300x  4.15.0-1035.40
  linux-image-4.15.0-1087-oracle  4.15.0-1087.95
  linux-image-4.15.0-1107-kvm     4.15.0-1107.109
  linux-image-4.15.0-1116-gcp     4.15.0-1116.130
  linux-image-4.15.0-1120-snapdragon  4.15.0-1120.129
  linux-image-4.15.0-1131-azure   4.15.0-1131.144
  linux-image-4.15.0-169-generic  4.15.0-169.177
  linux-image-4.15.0-169-generic-lpae  4.15.0-169.177
  linux-image-4.15.0-169-lowlatency  4.15.0-169.177
  linux-image-aws-lts-18.04       4.15.0.1121.124
  linux-image-azure-lts-18.04     4.15.0.1131.104
  linux-image-dell300x            4.15.0.1035.37
  linux-image-gcp-lts-18.04       4.15.0.1116.135
  linux-image-generic             4.15.0.169.158
  linux-image-generic-lpae        4.15.0.169.158
  linux-image-kvm                 4.15.0.1107.103
  linux-image-lowlatency          4.15.0.169.158
  linux-image-oracle-lts-18.04    4.15.0.1087.97
  linux-image-snapdragon          4.15.0.1120.123
  linux-image-virtual             4.15.0.169.158

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1087-oracle  4.15.0-1087.95~16.04.1
  linux-image-4.15.0-1116-gcp     4.15.0-1116.130~16.04.1
  linux-image-4.15.0-1131-azure   4.15.0-1131.144~16.04.1
  linux-image-4.15.0-169-generic  4.15.0-169.177~16.04.1
  linux-image-4.15.0-169-lowlatency  4.15.0-169.177~16.04.1
  linux-image-aws-hwe             4.15.0.1120.111
  linux-image-azure               4.15.0.1131.122
  linux-image-gcp                 4.15.0.1116.117
  linux-image-generic-hwe-16.04   4.15.0.169.161
  linux-image-gke                 4.15.0.1116.117
  linux-image-lowlatency-hwe-16.04  4.15.0.169.161
  linux-image-oem                 4.15.0.169.161
  linux-image-oracle              4.15.0.1087.75
  linux-image-virtual-hwe-16.04   4.15.0.169.161

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1131-azure   4.15.0-1131.144~14.04.1
  linux-image-azure               4.15.0.1131.104

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.