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

[USN-6130-1] Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-6130-1
June 01, 2023

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

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

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-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-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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to 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-2023-32233)

Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-31436)

Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-1380)

Update instructions:

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

Ubuntu 18.04 LTS:
linux-image-4.15.0-1120-oracle 4.15.0-1120.131
linux-image-4.15.0-1141-kvm 4.15.0-1141.146
linux-image-4.15.0-1151-gcp 4.15.0-1151.167
linux-image-4.15.0-1151-snapdragon 4.15.0-1151.161
linux-image-4.15.0-1157-aws 4.15.0-1157.170
linux-image-4.15.0-1166-azure 4.15.0-1166.181
linux-image-4.15.0-212-generic 4.15.0-212.223
linux-image-4.15.0-212-generic-lpae 4.15.0-212.223
linux-image-4.15.0-212-lowlatency 4.15.0-212.223
linux-image-aws-lts-18.04 4.15.0.1157.155
linux-image-azure-lts-18.04 4.15.0.1166.134
linux-image-gcp-lts-18.04 4.15.0.1151.165
linux-image-generic 4.15.0.212.195
linux-image-generic-lpae 4.15.0.212.195
linux-image-kvm 4.15.0.1141.132
linux-image-lowlatency 4.15.0.212.195
linux-image-oracle-lts-18.04 4.15.0.1120.125
linux-image-snapdragon 4.15.0.1151.150
linux-image-virtual 4.15.0.212.195

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
linux-image-4.15.0-1120-oracle 4.15.0-1120.131~16.04.1
linux-image-4.15.0-1151-gcp 4.15.0-1151.167~16.04.1
linux-image-4.15.0-1157-aws 4.15.0-1157.170~16.04.1
linux-image-4.15.0-1166-azure 4.15.0-1166.181~16.04.1
linux-image-4.15.0-212-generic 4.15.0-212.223~16.04.1
linux-image-4.15.0-212-lowlatency 4.15.0-212.223~16.04.1
linux-image-aws-hwe 4.15.0.1157.140
linux-image-azure 4.15.0.1166.150
linux-image-gcp 4.15.0.1151.141
linux-image-generic-hwe-16.04 4.15.0.212.197
linux-image-gke 4.15.0.1151.141
linux-image-lowlatency-hwe-16.04 4.15.0.212.197
linux-image-oem 4.15.0.212.197
linux-image-oracle 4.15.0.1120.101
linux-image-virtual-hwe-16.04 4.15.0.212.197

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
linux-image-4.15.0-1166-azure 4.15.0-1166.181~14.04.1
linux-image-azure 4.15.0.1166.132

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-6130-1
CVE-2023-1380, CVE-2023-30456, CVE-2023-31436, CVE-2023-32233

Package Information:
https://launchpad.net/ubuntu/+source/linux/4.15.0-212.223
https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1157.170
https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1166.181
https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1151.167
https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1141.146
https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1120.131
https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1151.161