==========================================================================
Ubuntu Security Notice USN-5164-1
November 30, 2021

linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15,
linux-dell300x, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle,
linux-raspi2, linux-snapdragon vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

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-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-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Option USB High Speed Mobile device driver in
the Linux kernel did not properly handle error conditions. A physically
proximate attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2021-37159)

It was discovered that the AMD Cryptographic Coprocessor (CCP) driver in
the Linux kernel did not properly deallocate memory in some error
conditions. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2021-3744, CVE-2021-3764)

Update instructions:

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1031-dell300x  4.15.0-1031.36
  linux-image-4.15.0-1084-oracle  4.15.0-1084.92
  linux-image-4.15.0-1099-raspi2  4.15.0-1099.106
  linux-image-4.15.0-1103-kvm     4.15.0-1103.105
  linux-image-4.15.0-1112-gcp     4.15.0-1112.126
  linux-image-4.15.0-1116-aws     4.15.0-1116.123
  linux-image-4.15.0-1116-snapdragon  4.15.0-1116.125
  linux-image-4.15.0-1127-azure   4.15.0-1127.140
  linux-image-4.15.0-163-generic  4.15.0-163.171
  linux-image-4.15.0-163-generic-lpae  4.15.0-163.171
  linux-image-4.15.0-163-lowlatency  4.15.0-163.171
  linux-image-aws-lts-18.04       4.15.0.1116.119
  linux-image-azure-lts-18.04     4.15.0.1127.100
  linux-image-dell300x            4.15.0.1031.33
  linux-image-gcp-lts-18.04       4.15.0.1112.131
  linux-image-generic             4.15.0.163.152
  linux-image-generic-lpae        4.15.0.163.152
  linux-image-kvm                 4.15.0.1103.99
  linux-image-lowlatency          4.15.0.163.152
  linux-image-oracle-lts-18.04    4.15.0.1084.94
  linux-image-raspi2              4.15.0.1099.97
  linux-image-snapdragon          4.15.0.1116.119
  linux-image-virtual             4.15.0.163.152

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1084-oracle  4.15.0-1084.92~16.04.1
  linux-image-4.15.0-1116-aws     4.15.0-1116.123~16.04.1
  linux-image-4.15.0-1127-azure   4.15.0-1127.140~16.04.1
  linux-image-4.15.0-163-generic  4.15.0-163.171~16.04.1
  linux-image-4.15.0-163-lowlatency  4.15.0-163.171~16.04.1
  linux-image-aws-hwe             4.15.0.1116.106
  linux-image-azure               4.15.0.1127.118
  linux-image-generic-hwe-16.04   4.15.0.163.156
  linux-image-lowlatency-hwe-16.04  4.15.0.163.156
  linux-image-oem                 4.15.0.163.156
  linux-image-oracle              4.15.0.1084.72
  linux-image-virtual-hwe-16.04   4.15.0.163.156

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1127-azure   4.15.0-1127.140~14.04.1
  linux-image-azure               4.15.0.1127.100

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-5164-1
  CVE-2021-37159, CVE-2021-3744, CVE-2021-3764

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.15.0-163.171
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1116.123
  https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1127.140
  https://launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1031.36
  https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1112.126
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1103.105
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1084.92
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1099.106
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1116.125