==========================================================================
Ubuntu Security Notice USN-5240-1
January 19, 2022

linux, linux-aws, linux-aws-5.11, linux-aws-5.4, linux-azure,
linux-azure-5.11, linux-azure-5.4, linux-bluefield, linux-gcp,
linux-gcp-5.11, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop,
linux-gkeop-5.4, linux-hwe-5.4, linux-ibm, linux-kvm, linux-oem-5.10,
linux-oem-5.13, linux-oem-5.14, linux-oracle, linux-oracle-5.11,
linux-oracle-5.4, linux-raspi, linux-raspi-5.4 vulnerability
==========================================================================

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

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

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-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-aws-5.11: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.11: Linux kernel for Microsoft Azure cloud systems
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-gcp-5.11: 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-ibm: Linux kernel for IBM cloud systems
- linux-oem-5.10: Linux kernel for OEM systems
- linux-oem-5.13: Linux kernel for OEM systems
- linux-oem-5.14: Linux kernel for OEM systems
- linux-oracle-5.11: Linux kernel for Oracle Cloud systems
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud 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
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

William Liu and Jamie Hill-Daniel discovered that the file system context
functionality in the Linux kernel contained an integer underflow
vulnerability, leading to an out-of-bounds write. A local attacker could
use this to cause a denial of service (system crash) or execute arbitrary
code.

Update instructions:

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

Ubuntu 21.10:
  linux-image-5.13.0-1010-kvm     5.13.0-1010.11
  linux-image-5.13.0-1011-aws     5.13.0-1011.12
  linux-image-5.13.0-1012-azure   5.13.0-1012.14
  linux-image-5.13.0-1012-gcp     5.13.0-1012.15
  linux-image-5.13.0-1015-oracle  5.13.0-1015.19
  linux-image-5.13.0-1015-raspi   5.13.0-1015.17
  linux-image-5.13.0-1015-raspi-nolpae  5.13.0-1015.17
  linux-image-5.13.0-27-generic   5.13.0-27.29
  linux-image-5.13.0-27-generic-64k  5.13.0-27.29
  linux-image-5.13.0-27-generic-lpae  5.13.0-27.29
  linux-image-5.13.0-27-lowlatency  5.13.0-27.29
  linux-image-aws                 5.13.0.1011.12
  linux-image-azure               5.13.0.1012.12
  linux-image-gcp                 5.13.0.1012.11
  linux-image-generic             5.13.0.27.37
  linux-image-generic-64k         5.13.0.27.37
  linux-image-generic-lpae        5.13.0.27.37
  linux-image-gke                 5.13.0.1012.11
  linux-image-kvm                 5.13.0.1010.10
  linux-image-lowlatency          5.13.0.27.37
  linux-image-oem-20.04           5.13.0.27.37
  linux-image-oracle              5.13.0.1015.15
  linux-image-raspi               5.13.0.1015.20
  linux-image-raspi-nolpae        5.13.0.1015.20
  linux-image-virtual             5.13.0.27.37

Ubuntu 21.04:
  linux-image-5.11.0-1024-kvm     5.11.0-1024.27
  linux-image-5.11.0-1027-aws     5.11.0-1027.30
  linux-image-5.11.0-1027-azure   5.11.0-1027.30
  linux-image-5.11.0-1027-oracle  5.11.0-1027.30
  linux-image-5.11.0-1027-raspi   5.11.0-1027.30
  linux-image-5.11.0-1027-raspi-nolpae  5.11.0-1027.30
  linux-image-5.11.0-1028-gcp     5.11.0-1028.32
  linux-image-5.11.0-49-generic   5.11.0-49.55
  linux-image-5.11.0-49-generic-64k  5.11.0-49.55
  linux-image-5.11.0-49-generic-lpae  5.11.0-49.55
  linux-image-5.11.0-49-lowlatency  5.11.0-49.55
  linux-image-aws                 5.11.0.1027.26
  linux-image-azure               5.11.0.1027.26
  linux-image-gcp                 5.11.0.1028.26
  linux-image-generic             5.11.0.49.48
  linux-image-generic-64k         5.11.0.49.48
  linux-image-generic-lpae        5.11.0.49.48
  linux-image-gke                 5.11.0.1028.26
  linux-image-kvm                 5.11.0.1024.24
  linux-image-lowlatency          5.11.0.49.48
  linux-image-oem-20.04           5.11.0.49.48
  linux-image-oracle              5.11.0.1027.26
  linux-image-raspi               5.11.0.1027.24
  linux-image-raspi-nolpae        5.11.0.1027.24
  linux-image-virtual             5.11.0.49.48

Ubuntu 20.04 LTS:
  linux-image-5.10.0-1057-oem     5.10.0-1057.61
  linux-image-5.11.0-1027-aws     5.11.0-1027.30~20.04.1
  linux-image-5.11.0-1027-azure   5.11.0-1027.30~20.04.1
  linux-image-5.11.0-1027-oracle  5.11.0-1027.30~20.04.1
  linux-image-5.11.0-1028-gcp     5.11.0-1028.32~20.04.1
  linux-image-5.13.0-1028-oem     5.13.0-1028.35
  linux-image-5.14.0-1020-oem     5.14.0-1020.22
  linux-image-5.4.0-1012-ibm      5.4.0-1012.13
  linux-image-5.4.0-1025-bluefield  5.4.0-1025.28
  linux-image-5.4.0-1031-gkeop    5.4.0-1031.32
  linux-image-5.4.0-1050-raspi    5.4.0-1050.56
  linux-image-5.4.0-1053-kvm      5.4.0-1053.55
  linux-image-5.4.0-1059-gke      5.4.0-1059.62
  linux-image-5.4.0-1061-oracle   5.4.0-1061.65
  linux-image-5.4.0-1062-gcp      5.4.0-1062.66
  linux-image-5.4.0-1067-azure    5.4.0-1067.70
  linux-image-5.4.0-96-generic    5.4.0-96.109
  linux-image-5.4.0-96-generic-lpae  5.4.0-96.109
  linux-image-5.4.0-96-lowlatency  5.4.0-96.109
  linux-image-aws                 5.11.0.1027.30~20.04.25
  linux-image-aws-lts-20.04       5.4.0.1063.65
  linux-image-azure               5.11.0.1027.30~20.04.25
  linux-image-azure-lts-20.04     5.4.0.1067.65
  linux-image-bluefield           5.4.0.1025.26
  linux-image-gcp                 5.11.0.1028.32~20.04.26
  linux-image-gcp-lts-20.04       5.4.0.1062.72
  linux-image-generic             5.4.0.96.100
  linux-image-generic-lpae        5.4.0.96.100
  linux-image-gke                 5.4.0.1059.69
  linux-image-gke-5.4             5.4.0.1059.69
  linux-image-gkeop               5.4.0.1031.34
  linux-image-gkeop-5.4           5.4.0.1031.34
  linux-image-ibm                 5.4.0.1012.13
  linux-image-ibm-lts-20.04       5.4.0.1012.13
  linux-image-kvm                 5.4.0.1053.52
  linux-image-lowlatency          5.4.0.96.100
  linux-image-oem                 5.4.0.96.100
  linux-image-oem-20.04           5.10.0.1057.57
  linux-image-oem-20.04b          5.10.0.1057.57
  linux-image-oem-20.04c          5.13.0.1028.30
  linux-image-oem-20.04d          5.14.0.1020.17
  linux-image-oem-osp1            5.4.0.96.100
  linux-image-oracle              5.11.0.1027.30~20.04.19
  linux-image-oracle-lts-20.04    5.4.0.1061.61
  linux-image-raspi               5.4.0.1050.84
  linux-image-raspi2              5.4.0.1050.84
  linux-image-virtual             5.4.0.96.100

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1031-gkeop    5.4.0-1031.32~18.04.1
  linux-image-5.4.0-1050-raspi    5.4.0-1050.56~18.04.1
  linux-image-5.4.0-1059-gke      5.4.0-1059.62~18.04.1
  linux-image-5.4.0-1061-oracle   5.4.0-1061.65~18.04.1
  linux-image-5.4.0-1062-gcp      5.4.0-1062.66~18.04.1
  linux-image-5.4.0-1067-azure    5.4.0-1067.70~18.04.1
  linux-image-5.4.0-96-generic    5.4.0-96.109~18.04.1
  linux-image-5.4.0-96-generic-lpae  5.4.0-96.109~18.04.1
  linux-image-5.4.0-96-lowlatency  5.4.0-96.109~18.04.1
  linux-image-aws                 5.4.0.1063.45
  linux-image-azure               5.4.0.1067.46
  linux-image-gcp                 5.4.0.1062.47
  linux-image-generic-hwe-18.04   5.4.0.96.109~18.04.84
  linux-image-generic-lpae-hwe-18.04  5.4.0.96.109~18.04.84
  linux-image-gke-5.4             5.4.0.1059.62~18.04.23
  linux-image-gkeop-5.4           5.4.0.1031.32~18.04.31
  linux-image-lowlatency-hwe-18.04  5.4.0.96.109~18.04.84
  linux-image-oem                 5.4.0.96.109~18.04.84
  linux-image-oem-osp1            5.4.0.96.109~18.04.84
  linux-image-oracle              5.4.0.1061.65~18.04.40
  linux-image-raspi-hwe-18.04     5.4.0.1050.52
  linux-image-snapdragon-hwe-18.04  5.4.0.96.109~18.04.84
  linux-image-virtual-hwe-18.04   5.4.0.96.109~18.04.84

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-5240-1
  CVE-2022-0185

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.13.0-27.29
  https://launchpad.net/ubuntu/+source/linux-aws/5.13.0-1011.12
  https://launchpad.net/ubuntu/+source/linux-azure/5.13.0-1012.14
  https://launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1012.15
  https://launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1010.11
  https://launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1015.19
  https://launchpad.net/ubuntu/+source/linux-raspi/5.13.0-1015.17
  https://launchpad.net/ubuntu/+source/linux/5.11.0-49.55
  https://launchpad.net/ubuntu/+source/linux-aws/5.11.0-1027.30
  https://launchpad.net/ubuntu/+source/linux-azure/5.11.0-1027.30
  https://launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1028.32
  https://launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1024.27
  https://launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1027.30
  https://launchpad.net/ubuntu/+source/linux-raspi/5.11.0-1027.30
  https://launchpad.net/ubuntu/+source/linux/5.4.0-96.109
  https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1063.66
  https://launchpad.net/ubuntu/+source/linux-aws-5.11/5.11.0-1027.30~20.04.1
  https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1067.70
  https://launchpad.net/ubuntu/+source/linux-azure-5.11/5.11.0-1027.30~20.04.1
  https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1025.28
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1062.66
  https://launchpad.net/ubuntu/+source/linux-gcp-5.11/5.11.0-1028.32~20.04.1
  https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1059.62
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1031.32
  https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1012.13
  https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1053.55
  https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1057.61
  https://launchpad.net/ubuntu/+source/linux-oem-5.13/5.13.0-1028.35
  https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1020.22
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1061.65
  https://launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1027.30~20.04.1
  https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1050.56
  https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1063.66~18.04.1
  https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1067.70~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1062.66~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1059.62~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gkeop-5.4/5.4.0-1031.32~18.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-96.109~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1061.65~18.04.1
  https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1050.56~18.04.1