A Linux kernel security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.

USN-5791-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-5791-1
January 06, 2023

linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-gke,
linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-kvm,
linux-oracle, linux-oracle-5.4, linux-raspi, linux-raspi-5.4
vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

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-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-raspi: Linux kernel for Raspberry Pi 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-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

It was discovered that a race condition existed in the Android Binder IPC
subsystem 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-2022-20421)

David Leadbeater discovered that the netfilter IRC protocol tracking
implementation in the Linux Kernel incorrectly handled certain message
payloads in some situations. A remote attacker could possibly use this to
cause a denial of service or bypass firewall filtering. (CVE-2022-2663)

It was discovered that the Intel 740 frame buffer driver in the Linux
kernel contained a divide by zero vulnerability. A local attacker could use
this to cause a denial of service (system crash). (CVE-2022-3061)

It was discovered that the sound subsystem 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). (CVE-2022-3303)

Gwnaun Jung discovered that the SFB packet scheduling 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-2022-3586)

It was discovered that the NILFS2 file system implementation in the Linux
kernel did not properly deallocate memory in certain error conditions. An
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2022-3646)

Hyunwoo Kim discovered that an integer overflow vulnerability existed in
the PXA3xx graphics driver in the Linux kernel. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2022-39842)

It was discovered that a race condition existed in the EFI capsule loader
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-2022-40307)

Zheng Wang and Zhuorao Yang discovered that the RealTek RTL8712U wireless
driver 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-2022-4095)

It was discovered that the USB monitoring (usbmon) component in the Linux
kernel did not properly set permissions on memory mapped in to user space
processes. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-43750)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1041-ibm 5.4.0-1041.46
linux-image-5.4.0-1061-gkeop 5.4.0-1061.65
linux-image-5.4.0-1078-raspi 5.4.0-1078.89
linux-image-5.4.0-1083-kvm 5.4.0-1083.89
linux-image-5.4.0-1091-gke 5.4.0-1091.98
linux-image-5.4.0-1091-oracle 5.4.0-1091.100
linux-image-5.4.0-1093-aws 5.4.0-1093.101
linux-image-5.4.0-1097-gcp 5.4.0-1097.106
linux-image-5.4.0-136-generic 5.4.0-136.153
linux-image-5.4.0-136-generic-lpae 5.4.0-136.153
linux-image-5.4.0-136-lowlatency 5.4.0-136.153
linux-image-aws-lts-20.04 5.4.0.1093.90
linux-image-gcp-lts-20.04 5.4.0.1097.99
linux-image-generic 5.4.0.136.134
linux-image-generic-lpae 5.4.0.136.134
linux-image-gke 5.4.0.1091.96
linux-image-gke-5.4 5.4.0.1091.96
linux-image-gkeop 5.4.0.1061.59
linux-image-gkeop-5.4 5.4.0.1061.59
linux-image-ibm 5.4.0.1041.67
linux-image-ibm-lts-20.04 5.4.0.1041.67
linux-image-kvm 5.4.0.1083.77
linux-image-lowlatency 5.4.0.136.134
linux-image-oem 5.4.0.136.134
linux-image-oem-osp1 5.4.0.136.134
linux-image-oracle-lts-20.04 5.4.0.1091.84
linux-image-raspi 5.4.0.1078.108
linux-image-raspi2 5.4.0.1078.108
linux-image-virtual 5.4.0.136.134

Ubuntu 18.04 LTS:
linux-image-5.4.0-1041-ibm 5.4.0-1041.46~18.04.1
linux-image-5.4.0-1078-raspi 5.4.0-1078.89~18.04.1
linux-image-5.4.0-1091-oracle 5.4.0-1091.100~18.04.1
linux-image-5.4.0-1093-aws 5.4.0-1093.102~18.04.2
linux-image-5.4.0-1097-gcp 5.4.0-1097.106~18.04.1
linux-image-5.4.0-136-generic 5.4.0-136.153~18.04.1
linux-image-5.4.0-136-generic-lpae 5.4.0-136.153~18.04.1
linux-image-5.4.0-136-lowlatency 5.4.0-136.153~18.04.1
linux-image-aws 5.4.0.1093.71
linux-image-gcp 5.4.0.1097.73
linux-image-generic-hwe-18.04 5.4.0.136.153~18.04.111
linux-image-generic-lpae-hwe-18.04 5.4.0.136.153~18.04.111
linux-image-ibm 5.4.0.1041.52
linux-image-lowlatency-hwe-18.04 5.4.0.136.153~18.04.111
linux-image-oem 5.4.0.136.153~18.04.111
linux-image-oem-osp1 5.4.0.136.153~18.04.111
linux-image-oracle 5.4.0.1091.100~18.04.65
linux-image-raspi-hwe-18.04 5.4.0.1078.75
linux-image-snapdragon-hwe-18.04 5.4.0.136.153~18.04.111
linux-image-virtual-hwe-18.04 5.4.0.136.153~18.04.111

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-5791-1
CVE-2022-20421, CVE-2022-2663, CVE-2022-3061, CVE-2022-3303,
CVE-2022-3586, CVE-2022-3646, CVE-2022-39842, CVE-2022-40307,
CVE-2022-4095, CVE-2022-43750

Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-136.153
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1093.101
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1097.106
https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1091.98
https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1061.65
https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1041.46
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1083.89
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1091.100
https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1078.89
https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1093.102~18.04.2
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1097.106~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-136.153~18.04.1
https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1041.46~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1091.100~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1078.89~18.04.1