A Linux kernel security update has been released for Ubuntu Linux 20.04 LTS and 22.04 LTS.

USN-5876-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-5876-1
February 15, 2023

linux-aws, linux-aws-5.15, linux-azure-fde, linux-gcp, linux-gcp-5.15,
linux-intel-iotg vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-intel-iotg: Linux kernel for Intel IoT platforms
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems

Details:

It was discovered that a memory leak existed in the Unix domain socket
implementation of the Linux kernel. A local attacker could use this to
cause a denial of service (memory exhaustion). (CVE-2022-3543)

It was discovered that the Bluetooth HCI implementation in the Linux kernel
did not properly deallocate memory in some situations. An attacker could
possibly use this cause a denial of service (memory exhaustion).
(CVE-2022-3619)

It was discovered that the hugetlb implementation in the Linux kernel
contained a race condition in some situations. A local attacker could use
this to cause a denial of service (system crash) or expose sensitive
information (kernel memory). (CVE-2022-3623)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform bounds checking 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 execute arbitrary code. (CVE-2022-3628)

It was discovered that a use-after-free vulnerability existed in the
Bluetooth stack in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2022-3640)

It was discovered that a race condition existed in the SMSC UFX USB driver
implementation in the Linux kernel, leading to a use-after-free
vulnerability. A physically proximate attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-41849)

It was discovered that a race condition existed in the Roccat HID driver in
the Linux kernel, 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-2022-41850)

Tamás Koczka discovered that the Bluetooth L2CAP implementation in the
Linux kernel did not properly initialize memory in some situations. A
physically proximate attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2022-42895)

Arnaud Gatignol, Quentin Minster, Florent Saudel and Guillaume Teissier
discovered that the KSMBD implementation in the Linux kernel did not
properly validate user-supplied data in some situations. An authenticated
attacker could use this to cause a denial of service (system crash), expose
sensitive information (kernel memory) or possibly execute arbitrary code.
(CVE-2022-47940)

It was discovered that a race condition existed in the qdisc implementation
in the Linux kernel, 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-2023-0590)

Update instructions:

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

Ubuntu 22.04 LTS:
linux-image-5.15.0-1025-intel-iotg 5.15.0-1025.30
linux-image-5.15.0-1029-gcp 5.15.0-1029.36
linux-image-5.15.0-1030-aws 5.15.0-1030.34
linux-image-5.15.0-1033-azure-fde 5.15.0-1033.40.1
linux-image-aws 5.15.0.1030.28
linux-image-aws-lts-22.04 5.15.0.1030.28
linux-image-azure-fde 5.15.0.1033.40.10
linux-image-gcp 5.15.0.1029.24
linux-image-intel-iotg 5.15.0.1025.24

Ubuntu 20.04 LTS:
linux-image-5.15.0-1029-gcp 5.15.0-1029.36~20.04.1
linux-image-5.15.0-1030-aws 5.15.0-1030.34~20.04.1
linux-image-aws 5.15.0.1030.34~20.04.19
linux-image-gcp 5.15.0.1029.36~20.04.1

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-5876-1
CVE-2022-3543, CVE-2022-3619, CVE-2022-3623, CVE-2022-3628,
CVE-2022-3640, CVE-2022-41849, CVE-2022-41850, CVE-2022-42895,
CVE-2022-47940, CVE-2023-0590

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1030.34
https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1033.40.1
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1029.36
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1025.30
https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1030.34~20.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1029.36~20.04.1