=========================================================================
Ubuntu Security Notice USN-5358-2
March 31, 2022

linux-aws-5.4, linux-azure, linux-gcp, linux-gcp-5.13, linux-gcp-5.4,
linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-5.13: 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-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) 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

Details:

It was discovered that the network traffic control implementation 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-2022-1055)

It was discovered that the IPsec implementation in the Linux
kernel did not properly allocate enough memory when performing ESP
transformations, leading to a heap-based buffer overflow. A local
attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2022-27666)

Update instructions:

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

Ubuntu 21.10:
  linux-image-5.13.0-1021-azure   5.13.0-1021.24
  linux-image-azure               5.13.0.1021.21

Ubuntu 20.04 LTS:
  linux-image-5.13.0-1023-gcp     5.13.0-1023.28~20.04.1
  linux-image-5.4.0-1038-gkeop    5.4.0-1038.39
  linux-image-5.4.0-1067-gke      5.4.0-1067.70
  linux-image-5.4.0-1069-gcp      5.4.0-1069.73
  linux-image-gcp                 5.13.0.1023.28~20.04.1
  linux-image-gcp-lts-20.04       5.4.0.1069.78
  linux-image-gke                 5.4.0.1067.77
  linux-image-gkeop               5.4.0.1038.41

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1038-gkeop    5.4.0-1038.39~18.04.1
  linux-image-5.4.0-1067-gke      5.4.0-1067.70~18.04.1
  linux-image-5.4.0-1069-gcp      5.4.0-1069.73~18.04.1
  linux-image-5.4.0-1071-aws      5.4.0-1071.76~18.04.1
  linux-image-aws                 5.4.0.1071.53
  linux-image-gcp                 5.4.0.1069.54
  linux-image-gke-5.4             5.4.0.1067.70~18.04.31
  linux-image-gkeop-5.4           5.4.0.1038.39~18.04.38

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-5358-2
  https://ubuntu.com/security/notices/USN-5358-1
  CVE-2022-1055, CVE-2022-27666

Package Information:
  https://launchpad.net/ubuntu/+source/linux-azure/5.13.0-1021.24
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1069.73
  https://launchpad.net/ubuntu/+source/linux-gcp-5.13/5.13.0-1023.28~20.04.1
  https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1067.70
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1038.39
  https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1071.76~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1069.73~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1067.70~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1038.39~18.04.1