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

USN-5728-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-5728-1
November 17, 2022

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4,
linux-bluefield, linux-gcp, linux-hwe-5.4, linux-ibm, linux-ibm-5.4,
linux-kvm, linux-oracle, linux-oracle-5.4, linux-raspi 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-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) 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-azure-5.4: Linux kernel for Microsoft Azure cloud 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

Details:

Jann Horn discovered that the Linux kernel did not properly track memory
allocations for anonymous VMA mappings in some situations, leading to
potential data structure reuse. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-42703)

It was discovered that a race condition existed in the memory address space
accounting 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-2022-41222)

It was discovered that a race condition existed in the instruction emulator
of the Linux kernel on Arm 64-bit systems. A local attacker could use this
to cause a denial of service (system crash). (CVE-2022-20422)

It was discovered that the KVM implementation in the Linux kernel did not
properly handle virtual CPUs without APICs in certain situations. A local
attacker could possibly use this to cause a denial of service (host system
crash). (CVE-2022-2153)

Hao Sun and Jiacheng Xu discovered that the NILFS file system
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-2022-2978)

Johannes Wikner and Kaveh Razavi discovered that for some Intel x86-64
processors, the Linux kernel's protections against speculative branch
target injection attacks were insufficient in some circumstances. A local
attacker could possibly use this to expose sensitive information.
(CVE-2022-29901)

Abhishek Shah discovered a race condition in the PF_KEYv2 implementation in
the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly expose sensitive information (kernel
memory). (CVE-2022-3028)

It was discovered that the Netlink device interface implementation in the
Linux kernel did not properly handle certain error conditions, leading to a
use-after-free vulnerability with some network device drivers. A local
attacker with admin access to the network device could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-3625)

It was discovered that the IDT 77252 ATM PCI device driver in the Linux
kernel did not properly remove any pending timers during device exit,
resulting in a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2022-3635)

Jann Horn discovered a race condition existed in the Linux kernel when
unmapping VMAs in certain situations, resulting in possible use-after-free
vulnerabilities. A local attacker could possibly use this to cause a denial
of service (system crash) or execute arbitrary code. (CVE-2022-39188)

Xingyuan Mo and Gengjia Chen discovered that the Promise SuperTrak EX
storage controller driver in the Linux kernel did not properly handle
certain structures. A local attacker could potentially use this to expose
sensitive information (kernel memory). (CVE-2022-40768)

Sönke Huster discovered that a use-after-free vulnerability existed in the
WiFi driver stack in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2022-42719)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.4.0-1037-ibm 5.4.0-1037.42
linux-image-5.4.0-1050-bluefield 5.4.0-1050.56
linux-image-5.4.0-1074-raspi 5.4.0-1074.85
linux-image-5.4.0-1079-kvm 5.4.0-1079.85
linux-image-5.4.0-1087-oracle 5.4.0-1087.96
linux-image-5.4.0-1089-aws 5.4.0-1089.97
linux-image-5.4.0-1093-gcp 5.4.0-1093.102
linux-image-5.4.0-1095-azure 5.4.0-1095.101
linux-image-5.4.0-132-generic 5.4.0-132.148
linux-image-5.4.0-132-generic-lpae 5.4.0-132.148
linux-image-5.4.0-132-lowlatency 5.4.0-132.148
linux-image-aws-lts-20.04 5.4.0.1089.88
linux-image-azure-lts-20.04 5.4.0.1095.91
linux-image-bluefield 5.4.0.1050.48
linux-image-gcp-lts-20.04 5.4.0.1093.97
linux-image-generic 5.4.0.132.132
linux-image-generic-lpae 5.4.0.132.132
linux-image-ibm 5.4.0.1037.65
linux-image-ibm-lts-20.04 5.4.0.1037.65
linux-image-kvm 5.4.0.1079.75
linux-image-lowlatency 5.4.0.132.132
linux-image-oem 5.4.0.132.132
linux-image-oem-osp1 5.4.0.132.132
linux-image-oracle-lts-20.04 5.4.0.1087.83
linux-image-raspi 5.4.0.1074.106
linux-image-raspi2 5.4.0.1074.106
linux-image-virtual 5.4.0.132.132

Ubuntu 18.04 LTS:
linux-image-5.4.0-1037-ibm 5.4.0-1037.42~18.04.1
linux-image-5.4.0-1087-oracle 5.4.0-1087.96~18.04.1
linux-image-5.4.0-1089-aws 5.4.0-1089.97~18.04.1
linux-image-5.4.0-1095-azure 5.4.0-1095.101~18.04.1
linux-image-5.4.0-132-generic 5.4.0-132.148~18.04.1
linux-image-5.4.0-132-generic-lpae 5.4.0-132.148~18.04.1
linux-image-5.4.0-132-lowlatency 5.4.0-132.148~18.04.1
linux-image-aws 5.4.0.1089.68
linux-image-azure 5.4.0.1095.71
linux-image-generic-hwe-18.04 5.4.0.132.148~18.04.109
linux-image-generic-lpae-hwe-18.04 5.4.0.132.148~18.04.109
linux-image-ibm 5.4.0.1037.50
linux-image-lowlatency-hwe-18.04 5.4.0.132.148~18.04.109
linux-image-oem 5.4.0.132.148~18.04.109
linux-image-oem-osp1 5.4.0.132.148~18.04.109
linux-image-oracle 5.4.0.1087.96~18.04.63
linux-image-snapdragon-hwe-18.04 5.4.0.132.148~18.04.109
linux-image-virtual-hwe-18.04 5.4.0.132.148~18.04.109

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-5728-1
CVE-2022-20422, CVE-2022-2153, CVE-2022-2978, CVE-2022-29901,
CVE-2022-3028, CVE-2022-3625, CVE-2022-3635, CVE-2022-39188,
CVE-2022-40768, CVE-2022-41222, CVE-2022-42703, CVE-2022-42719

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.4.0-132.148
  https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1089.97
  https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1095.101
  https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1050.56
  https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1093.102
  https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1037.42
  https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1079.85
  https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1087.96
  https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1074.85
  https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1089.97~18.04.1
  https://launchpad.net/ubuntu/+source/linux-azure-5.4/5.4.0-1095.101~18.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-132.148~18.04.1
  https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1037.42~18.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1087.96~18.04.1