==========================================================================
Ubuntu Security Notice USN-5729-1
November 17, 2022

linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15,
linux-gcp, linux-gke, linux-gkeop, linux-hwe-5.15, linux-ibm, linux-kvm,
linux-lowlatency, linux-lowlatency-hwe-5.15, linux-oracle,
linux-oracle-5.15 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: 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-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel
- linux-lowlatency-hwe-5.15: Linux low latency kernel
- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

Details:

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)

Hsin-Wei Hung discovered that the BPF subsystem in the Linux kernel
contained an out-of-bounds read vulnerability in the x86 JIT compiler. A
local attacker could possibly use this to cause a denial of service (system
crash) or expose sensitive information (kernel memory). (CVE-2022-2905)

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)

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)

Gwangun Jung discovered that the netfilter subsystem in the Linux kernel
did not properly prevent binding to an already bound chain. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-39190)

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)

Update instructions:

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

Ubuntu 22.04 LTS:
  linux-image-5.15.0-1008-gkeop   5.15.0-1008.12
  linux-image-5.15.0-1018-ibm     5.15.0-1018.21
  linux-image-5.15.0-1020-gke     5.15.0-1020.25
  linux-image-5.15.0-1021-kvm     5.15.0-1021.26
  linux-image-5.15.0-1022-gcp     5.15.0-1022.29
  linux-image-5.15.0-1022-oracle  5.15.0-1022.28
  linux-image-5.15.0-1023-aws     5.15.0-1023.27
  linux-image-5.15.0-1023-azure   5.15.0-1023.29
  linux-image-5.15.0-53-generic   5.15.0-53.59
  linux-image-5.15.0-53-generic-64k  5.15.0-53.59
  linux-image-5.15.0-53-generic-lpae  5.15.0-53.59
  linux-image-5.15.0-53-lowlatency  5.15.0-53.59
  linux-image-5.15.0-53-lowlatency-64k  5.15.0-53.59
  linux-image-aws                 5.15.0.1023.23
  linux-image-aws-lts-22.04       5.15.0.1023.23
  linux-image-azure               5.15.0.1023.22
  linux-image-azure-lts-22.04     5.15.0.1023.22
  linux-image-gcp                 5.15.0.1022.19
  linux-image-generic             5.15.0.53.53
  linux-image-generic-64k         5.15.0.53.53
  linux-image-generic-64k-hwe-22.04  5.15.0.53.53
  linux-image-generic-hwe-22.04   5.15.0.53.53
  linux-image-generic-lpae        5.15.0.53.53
  linux-image-generic-lpae-hwe-22.04  5.15.0.53.53
  linux-image-gke                 5.15.0.1020.21
  linux-image-gke-5.15            5.15.0.1020.21
  linux-image-gkeop               5.15.0.1008.9
  linux-image-gkeop-5.15          5.15.0.1008.9
  linux-image-ibm                 5.15.0.1018.16
  linux-image-kvm                 5.15.0.1021.19
  linux-image-lowlatency          5.15.0.53.48
  linux-image-lowlatency-64k      5.15.0.53.48
  linux-image-lowlatency-64k-hwe-22.04  5.15.0.53.48
  linux-image-lowlatency-hwe-22.04  5.15.0.53.48
  linux-image-oem-20.04           5.15.0.53.53
  linux-image-oracle              5.15.0.1022.19
  linux-image-virtual             5.15.0.53.53
  linux-image-virtual-hwe-22.04   5.15.0.53.53

Ubuntu 20.04 LTS:
  linux-image-5.15.0-1022-oracle  5.15.0-1022.28~20.04.1
  linux-image-5.15.0-1023-aws     5.15.0-1023.27~20.04.1
  linux-image-5.15.0-1023-azure   5.15.0-1023.29~20.04.1
  linux-image-5.15.0-53-generic   5.15.0-53.59~20.04.1
  linux-image-5.15.0-53-generic-64k  5.15.0-53.59~20.04.1
  linux-image-5.15.0-53-generic-lpae  5.15.0-53.59~20.04.1
  linux-image-5.15.0-53-lowlatency  5.15.0-53.59~20.04.1
  linux-image-5.15.0-53-lowlatency-64k  5.15.0-53.59~20.04.1
  linux-image-aws                 5.15.0.1023.27~20.04.15
  linux-image-azure               5.15.0.1023.29~20.04.16
  linux-image-generic-64k-hwe-20.04  5.15.0.53.59~20.04.21
  linux-image-generic-hwe-20.04   5.15.0.53.59~20.04.21
  linux-image-generic-lpae-hwe-20.04  5.15.0.53.59~20.04.21
  linux-image-lowlatency-64k-hwe-20.04  5.15.0.53.59~20.04.19
  linux-image-lowlatency-hwe-20.04  5.15.0.53.59~20.04.19
  linux-image-oracle              5.15.0.1022.28~20.04.1
  linux-image-virtual-hwe-20.04   5.15.0.53.59~20.04.21

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-5729-1
  CVE-2022-20422, CVE-2022-2905, CVE-2022-2978, CVE-2022-3028,
  CVE-2022-3625, CVE-2022-3635, CVE-2022-39190, CVE-2022-40768

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.15.0-53.59
  https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1023.27
  https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1023.29
  https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1022.29
  https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1020.25
  https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1008.12
  https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1018.21
  https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1021.26
  https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-53.59
  https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1022.28
  https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1023.27~20.04.1
  https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1023.29~20.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-53.59~20.04.1
  https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-53.59~20.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1022.28~20.04.1