A Linux kernel security update has been released for Ubuntu Linux 14.04 ESM, 16.04 ESM, 18.04 LTS, and 20.04 LTS.

USN-6047-1: Linux kernel vulnerability

==========================================================================
Ubuntu Security Notice USN-6047-1
April 27, 2023

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-4.15,
linux-azure-5.4, linux-gcp, linux-gcp-4.15, linux-gcp-5.4, linux-gke,
linux-gkeop, linux-hwe, linux-hwe-5.4, linux-ibm, linux-kvm, linux-oracle,
linux-oracle-5.4 vulnerability
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

The system could be made to 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-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-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-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel did not properly perform filter deactivation in some
situations. A local attacker could possibly use this to gain elevated
privileges. Please note that with the fix for this CVE, kernel support for
the TCINDEX classifier has been removed.

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1048-ibm 5.4.0-1048.53
linux-image-5.4.0-1068-gkeop 5.4.0-1068.72
linux-image-5.4.0-1090-kvm 5.4.0-1090.96
linux-image-5.4.0-1098-gke 5.4.0-1098.105
linux-image-5.4.0-1100-oracle 5.4.0-1100.109
linux-image-5.4.0-1101-aws 5.4.0-1101.109
linux-image-5.4.0-1104-gcp 5.4.0-1104.113
linux-image-5.4.0-1107-azure 5.4.0-1107.113
linux-image-5.4.0-148-generic 5.4.0-148.165
linux-image-5.4.0-148-generic-lpae 5.4.0-148.165
linux-image-5.4.0-148-lowlatency 5.4.0-148.165
linux-image-aws-lts-20.04 5.4.0.1101.98
linux-image-azure-lts-20.04 5.4.0.1107.100
linux-image-gcp-lts-20.04 5.4.0.1104.106
linux-image-generic 5.4.0.148.146
linux-image-generic-hwe-18.04 5.4.0.148.146
linux-image-generic-hwe-18.04-edge 5.4.0.148.146
linux-image-generic-lpae 5.4.0.148.146
linux-image-generic-lpae-hwe-18.04 5.4.0.148.146
linux-image-generic-lpae-hwe-18.04-edge 5.4.0.148.146
linux-image-gke 5.4.0.1098.103
linux-image-gke-5.4 5.4.0.1098.103
linux-image-gkeop 5.4.0.1068.66
linux-image-gkeop-5.4 5.4.0.1068.66
linux-image-ibm 5.4.0.1048.74
linux-image-ibm-lts-20.04 5.4.0.1048.74
linux-image-kvm 5.4.0.1090.84
linux-image-lowlatency 5.4.0.148.146
linux-image-oem 5.4.0.148.146
linux-image-oem-osp1 5.4.0.148.146
linux-image-oracle-lts-20.04 5.4.0.1100.93
linux-image-virtual 5.4.0.148.146

Ubuntu 18.04 LTS:
linux-image-4.15.0-1118-oracle 4.15.0-1118.129
linux-image-4.15.0-1139-kvm 4.15.0-1139.144
linux-image-4.15.0-1149-gcp 4.15.0-1149.165
linux-image-4.15.0-1164-azure 4.15.0-1164.179
linux-image-4.15.0-210-generic 4.15.0-210.221
linux-image-4.15.0-210-generic-lpae 4.15.0-210.221
linux-image-4.15.0-210-lowlatency 4.15.0-210.221
linux-image-5.4.0-1100-oracle 5.4.0-1100.109~18.04.1
linux-image-5.4.0-1101-aws 5.4.0-1101.109~18.04.1
linux-image-5.4.0-1104-gcp 5.4.0-1104.113~18.04.1
linux-image-5.4.0-1107-azure 5.4.0-1107.113~18.04.1
linux-image-5.4.0-148-generic 5.4.0-148.165~18.04.1
linux-image-5.4.0-148-generic-lpae 5.4.0-148.165~18.04.1
linux-image-5.4.0-148-lowlatency 5.4.0-148.165~18.04.1
linux-image-aws 5.4.0.1101.79
linux-image-azure 5.4.0.1107.80
linux-image-azure-lts-18.04 4.15.0.1164.132
linux-image-gcp 5.4.0.1104.80
linux-image-gcp-lts-18.04 4.15.0.1149.163
linux-image-generic 4.15.0.210.193
linux-image-generic-hwe-18.04 5.4.0.148.165~18.04.119
linux-image-generic-lpae 4.15.0.210.193
linux-image-generic-lpae-hwe-18.04 5.4.0.148.165~18.04.119
linux-image-kvm 4.15.0.1139.130
linux-image-lowlatency 4.15.0.210.193
linux-image-lowlatency-hwe-18.04 5.4.0.148.165~18.04.119
linux-image-oem 5.4.0.148.165~18.04.119
linux-image-oem-osp1 5.4.0.148.165~18.04.119
linux-image-oracle 5.4.0.1100.109~18.04.72
linux-image-oracle-lts-18.04 4.15.0.1118.123
linux-image-snapdragon-hwe-18.04 5.4.0.148.165~18.04.119
linux-image-virtual 4.15.0.210.193
linux-image-virtual-hwe-18.04 5.4.0.148.165~18.04.119

Ubuntu 16.04 ESM:
linux-image-4.15.0-1118-oracle 4.15.0-1118.129~16.04.1
linux-image-4.15.0-1149-gcp 4.15.0-1149.165~16.04.1
linux-image-4.15.0-1164-azure 4.15.0-1164.179~16.04.1
linux-image-4.15.0-210-generic 4.15.0-210.221~16.04.1
linux-image-4.15.0-210-lowlatency 4.15.0-210.221~16.04.1
linux-image-azure 4.15.0.1164.148
linux-image-gcp 4.15.0.1149.139
linux-image-generic-hwe-16.04 4.15.0.210.195
linux-image-gke 4.15.0.1149.139
linux-image-lowlatency-hwe-16.04 4.15.0.210.195
linux-image-oem 4.15.0.210.195
linux-image-oracle 4.15.0.1118.99
linux-image-virtual-hwe-16.04 4.15.0.210.195

Ubuntu 14.04 ESM:
linux-image-4.15.0-1164-azure 4.15.0-1164.179~14.04.1
linux-image-azure 4.15.0.1164.130

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-6047-1
CVE-2023-1829

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-148.165
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1101.109
https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1107.113
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1104.113
https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1098.105
https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1068.72
https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1048.53
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1090.96
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1100.109
https://launchpad.net/ubuntu/+source/linux/4.15.0-210.221
https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1101.109~18.04.1
https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1164.179
https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1107.113~18.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1149.165
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1104.113~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-148.165~18.04.1
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1139.144
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1118.129
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1100.109~18.04.1