A Linux kernel security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS

USN-5267-1: Linux kernel vulnerabilities

=========================================================================
Ubuntu Security Notice USN-5267-1
February 03, 2022

linux, linux-aws, linux-aws-5.4, linux-bluefield, linux-gcp,
linux-gcp-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, linux-ibm,
linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

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-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-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop-5.4: Linux kernel for Google Container Engine (GKE) 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 Bluetooth subsystem in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2021-3640)

Likang Luo discovered that a race condition existed in the Bluetooth
subsystem of the Linux kernel, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2021-3752)

Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel
did not properly perform bounds checking in some situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2021-42739)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1013-ibm 5.4.0-1013.14
linux-image-5.4.0-1026-bluefield 5.4.0-1026.29
linux-image-5.4.0-1032-gkeop 5.4.0-1032.33
linux-image-5.4.0-1054-kvm 5.4.0-1054.56
linux-image-5.4.0-1062-oracle 5.4.0-1062.66
linux-image-5.4.0-1063-gcp 5.4.0-1063.67
linux-image-5.4.0-1064-aws 5.4.0-1064.67
linux-image-5.4.0-97-generic 5.4.0-97.110
linux-image-5.4.0-97-generic-lpae 5.4.0-97.110
linux-image-5.4.0-97-lowlatency 5.4.0-97.110
linux-image-aws-lts-20.04 5.4.0.1064.66
linux-image-bluefield 5.4.0.1026.27
linux-image-gcp-lts-20.04 5.4.0.1063.73
linux-image-generic 5.4.0.97.101
linux-image-generic-hwe-18.04 5.4.0.97.101
linux-image-generic-hwe-18.04-edge 5.4.0.97.101
linux-image-generic-lpae 5.4.0.97.101
linux-image-generic-lpae-hwe-18.04 5.4.0.97.101
linux-image-generic-lpae-hwe-18.04-edge 5.4.0.97.101
linux-image-gkeop 5.4.0.1032.35
linux-image-gkeop-5.4 5.4.0.1032.35
linux-image-ibm 5.4.0.1013.14
linux-image-ibm-lts-20.04 5.4.0.1013.14
linux-image-kvm 5.4.0.1054.53
linux-image-lowlatency 5.4.0.97.101
linux-image-lowlatency-hwe-18.04 5.4.0.97.101
linux-image-lowlatency-hwe-18.04-edge 5.4.0.97.101
linux-image-oem 5.4.0.97.101
linux-image-oem-osp1 5.4.0.97.101
linux-image-oracle-lts-20.04 5.4.0.1062.62
linux-image-virtual 5.4.0.97.101
linux-image-virtual-hwe-18.04 5.4.0.97.101
linux-image-virtual-hwe-18.04-edge 5.4.0.97.101

Ubuntu 18.04 LTS:
linux-image-5.4.0-1032-gkeop 5.4.0-1032.33~18.04.1
linux-image-5.4.0-1062-oracle 5.4.0-1062.66~18.04.1
linux-image-5.4.0-1063-gcp 5.4.0-1063.67~18.04.1
linux-image-5.4.0-97-generic 5.4.0-97.110~18.04.1
linux-image-5.4.0-97-generic-lpae 5.4.0-97.110~18.04.1
linux-image-5.4.0-97-lowlatency 5.4.0-97.110~18.04.1
linux-image-aws 5.4.0.1064.46
linux-image-gcp 5.4.0.1063.48
linux-image-generic-hwe-18.04 5.4.0.97.110~18.04.85
linux-image-generic-lpae-hwe-18.04 5.4.0.97.110~18.04.85
linux-image-gkeop-5.4 5.4.0.1032.33~18.04.32
linux-image-lowlatency-hwe-18.04 5.4.0.97.110~18.04.85
linux-image-oem 5.4.0.97.110~18.04.85
linux-image-oem-osp1 5.4.0.97.110~18.04.85
linux-image-oracle 5.4.0.1062.66~18.04.41
linux-image-snapdragon-hwe-18.04 5.4.0.97.110~18.04.85
linux-image-virtual-hwe-18.04 5.4.0.97.110~18.04.85

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.

References:
  https://ubuntu.com/security/notices/USN-5267-1
CVE-2021-3640, CVE-2021-3752, CVE-2021-42739

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.4.0-97.110
  https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1064.67
  https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1026.29
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1063.67
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1032.33
  https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1013.14
  https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1054.56
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1062.66
  https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1064.67~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1063.67~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1032.33~18.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-97.110~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1062.66~18.04.1