=========================================================================Ubuntu Security Notice USN-5163-1
November 30, 2021

linux, linux-aws, linux-aws-5.4, linux-azure, linux-gcp, linux-gke,
linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-hwe-5.4, 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-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) 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-gke-5.4: Linux kernel for Google Container Engine (GKE) 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:

Ilja Van Sprundel discovered that the SCTP implementation in the Linux
kernel did not properly perform size validations on incoming packets in
some situations. An attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2021-3655)

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 20.04 LTS:
  linux-image-5.4.0-1027-gkeop    5.4.0-1027.28
  linux-image-5.4.0-1050-kvm      5.4.0-1050.52
  linux-image-5.4.0-1056-gke      5.4.0-1056.59
  linux-image-5.4.0-1058-gcp      5.4.0-1058.62
  linux-image-5.4.0-1058-oracle   5.4.0-1058.62
  linux-image-5.4.0-1060-aws      5.4.0-1060.63
  linux-image-5.4.0-1064-azure    5.4.0-1064.67
  linux-image-5.4.0-91-generic    5.4.0-91.102
  linux-image-5.4.0-91-generic-lpae  5.4.0-91.102
  linux-image-5.4.0-91-lowlatency  5.4.0-91.102
  linux-image-aws-lts-20.04       5.4.0.1060.63
  linux-image-azure-lts-20.04     5.4.0.1064.62
  linux-image-gcp-lts-20.04       5.4.0.1058.68
  linux-image-generic             5.4.0.91.95
  linux-image-generic-lpae        5.4.0.91.95
  linux-image-gke                 5.4.0.1056.66
  linux-image-gke-5.4             5.4.0.1056.66
  linux-image-gkeop               5.4.0.1027.30
  linux-image-gkeop-5.4           5.4.0.1027.30
  linux-image-kvm                 5.4.0.1050.49
  linux-image-lowlatency          5.4.0.91.95
  linux-image-oem                 5.4.0.91.95
  linux-image-oem-osp1            5.4.0.91.95
  linux-image-oracle-lts-20.04    5.4.0.1058.58
  linux-image-virtual             5.4.0.91.95

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1027-gkeop    5.4.0-1027.28~18.04.1
  linux-image-5.4.0-1056-gke      5.4.0-1056.59~18.04.1
  linux-image-5.4.0-1058-oracle   5.4.0-1058.62~18.04.1
  linux-image-5.4.0-1060-aws      5.4.0-1060.63~18.04.1
  linux-image-5.4.0-91-generic    5.4.0-91.102~18.04.1
  linux-image-5.4.0-91-generic-lpae  5.4.0-91.102~18.04.1
  linux-image-5.4.0-91-lowlatency  5.4.0-91.102~18.04.1
  linux-image-aws                 5.4.0.1060.43
  linux-image-generic-hwe-18.04   5.4.0.91.102~18.04.81
  linux-image-generic-lpae-hwe-18.04  5.4.0.91.102~18.04.81
  linux-image-gke-5.4             5.4.0.1056.59~18.04.21
  linux-image-gkeop-5.4           5.4.0.1027.28~18.04.28
  linux-image-lowlatency-hwe-18.04  5.4.0.91.102~18.04.81
  linux-image-oem                 5.4.0.91.102~18.04.81
  linux-image-oem-osp1            5.4.0.91.102~18.04.81
  linux-image-oracle              5.4.0.1058.62~18.04.38
  linux-image-snapdragon-hwe-18.04  5.4.0.91.102~18.04.81
  linux-image-virtual-hwe-18.04   5.4.0.91.102~18.04.81

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-5163-1
  CVE-2021-3655, CVE-2021-37159, CVE-2021-3744, CVE-2021-3764

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.4.0-91.102
  https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1060.63
  https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1064.67
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1058.62
  https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1056.59
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1027.28
  https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1050.52
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1058.62
  https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1060.63~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1056.59~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1027.28~18.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-91.102~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1058.62~18.04.1