Ubuntu 20.04 LTS: USN-5267-2 Moderate: Linux Kernel Regression Fix

ubuntu

February 8, 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-gcp: Linux kernel for Google Cloud Platform (GCP) 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-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

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

Details:

USN-5267-1 fixed vulnerabilities in the Linux kernel. Unfortunately,

that update introduced a regression that caused the kernel to freeze

when accessing CIFS shares in some situations. This update fixes

the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that the Bluetooth subsystem in the Linux kernel

...

Read the Full Advisory

Topics Covered

security advisory DoS Ubuntu kernel regression CIFS

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1014-ibm      5.4.0-1014.15
  linux-image-5.4.0-1055-kvm      5.4.0-1055.57
  linux-image-5.4.0-1063-oracle   5.4.0-1063.67
  linux-image-5.4.0-1064-gcp      5.4.0-1064.68
  linux-image-5.4.0-1065-aws      5.4.0-1065.68
  linux-image-5.4.0-99-generic    5.4.0-99.112
  linux-image-5.4.0-99-generic-lpae  5.4.0-99.112
  linux-image-5.4.0-99-lowlatency  5.4.0-99.112
  linux-image-aws-lts-20.04       5.4.0.1065.67
  linux-image-gcp-lts-20.04       5.4.0.1064.74
  linux-image-generic             5.4.0.99.103
  linux-image-generic-lpae        5.4.0.99.103
  linux-image-ibm                 5.4.0.1014.15
  linux-image-ibm-lts-20.04       5.4.0.1014.15
  linux-image-kvm                 5.4.0.1055.54
  linux-image-lowlatency          5.4.0.99.103
  linux-image-oem                 5.4.0.99.103
  linux-image-oem-osp1            5.4.0.99.103
  linux-image-oracle-lts-20.04    5.4.0.1063.63
  linux-image-virtual             5.4.0.99.103

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1063-oracle   5.4.0-1063.67~18.04.1
  linux-image-5.4.0-1064-gcp      5.4.0-1064.68~18.04.1
  linux-image-5.4.0-99-generic    5.4.0-99.112~18.04.1
  linux-image-5.4.0-99-generic-lpae  5.4.0-99.112~18.04.1
  linux-image-5.4.0-99-lowlatency  5.4.0-99.112~18.04.1
  linux-image-aws                 5.4.0.1065.47
  linux-image-gcp                 5.4.0.1064.49
  linux-image-generic-hwe-18.04   5.4.0.99.112~18.04.86
  linux-image-generic-lpae-hwe-18.04  5.4.0.99.112~18.04.86
  linux-image-lowlatency-hwe-18.04  5.4.0.99.112~18.04.86
  linux-image-oem                 5.4.0.99.112~18.04.86
  linux-image-oem-osp1            5.4.0.99.112~18.04.86
  linux-image-oracle              5.4.0.1063.67~18.04.42
  linux-image-snapdragon-hwe-18.04  5.4.0.99.112~18.04.86
  linux-image-virtual-hwe-18.04   5.4.0.99.112~18.04.86

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.