Ubuntu: 2021-10-20 USN-5114-1 Critical: Multiple Kernel Issues

ubuntu

October 20, 2021

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-raspi2: Linux kernel for Raspberry Pi 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 a race condition existed in the Atheros Ath9k WiFi

driver in the Linux kernel. An attacker could possibly use this to expose

sensitive information (WiFi network traffic). (CVE-2020-3...

Read the Full Advisory

Topics Covered

security advisory denial of service critical kernel ubuntu linux sensitive information

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1029-dell300x  4.15.0-1029.34
  linux-image-4.15.0-1097-raspi2  4.15.0-1097.103
  linux-image-4.15.0-1101-kvm     4.15.0-1101.103
  linux-image-4.15.0-1110-gcp     4.15.0-1110.124
  linux-image-4.15.0-1114-aws     4.15.0-1114.121
  linux-image-4.15.0-1114-snapdragon  4.15.0-1114.123
  linux-image-4.15.0-1125-azure   4.15.0-1125.138
  linux-image-4.15.0-161-generic  4.15.0-161.169
  linux-image-4.15.0-161-generic-lpae  4.15.0-161.169
  linux-image-4.15.0-161-lowlatency  4.15.0-161.169
  linux-image-aws-lts-18.04       4.15.0.1114.117
  linux-image-azure-lts-18.04     4.15.0.1125.98
  linux-image-dell300x            4.15.0.1029.31
  linux-image-gcp-lts-18.04       4.15.0.1110.129
  linux-image-generic             4.15.0.161.150
  linux-image-generic-lpae        4.15.0.161.150
  linux-image-kvm                 4.15.0.1101.97
  linux-image-lowlatency          4.15.0.161.150
  linux-image-raspi2              4.15.0.1097.95
  linux-image-snapdragon          4.15.0.1114.117
  linux-image-virtual             4.15.0.161.150

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1110-gcp     4.15.0-1110.124~16.04.1
  linux-image-4.15.0-1113-aws     4.15.0-1113.120~16.04.1
  linux-image-4.15.0-1125-azure   4.15.0-1125.138~16.04.1
  linux-image-4.15.0-161-generic  4.15.0-161.169~16.04.1
  linux-image-4.15.0-161-lowlatency  4.15.0-161.169~16.04.1
  linux-image-aws-hwe             4.15.0.1113.104
  linux-image-azure               4.15.0.1125.116
  linux-image-gcp                 4.15.0.1110.111
  linux-image-generic-hwe-16.04   4.15.0.161.154
  linux-image-gke                 4.15.0.1110.111
  linux-image-lowlatency-hwe-16.04  4.15.0.161.154
  linux-image-oem                 4.15.0.161.154
  linux-image-virtual-hwe-16.04   4.15.0.161.154

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1125-azure   4.15.0-1125.138~14.04.1
  linux-image-azure               4.15.0.1125.98

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.