==========================================================================
Ubuntu Security Notice USN-5803-1
January 13, 2023

linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15,
linux-gcp, linux-gcp-5.15, linux-hwe-5.15, linux-ibm, linux-kvm,
linux-oracle, linux-raspi, vulnerabilities
==========================================================================

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

- Ubuntu 22.10
- 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-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-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi 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-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel

Details:

Kyle Zeng discovered that the sysctl implementation in the Linux kernel
contained a stack-based buffer overflow. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.
(CVE-2022-4378)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-42896)

It was discovered that the Xen netback driver in the Linux kernel did not
properly handle packets structured in certain ways. An attacker in a guest
VM could possibly use this to cause a denial of service (host NIC
availability). (CVE-2022-3643)

It was discovered that an integer overflow vulnerability existed in the
Bluetooth subsystem in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2022-45934)

Update instructions:

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

Ubuntu 22.10:
  linux-image-5.19.0-1015-gcp     5.19.0-1015.16
  linux-image-5.19.0-1015-ibm     5.19.0-1015.16
  linux-image-5.19.0-1015-oracle  5.19.0-1015.17
  linux-image-5.19.0-1016-kvm     5.19.0-1016.17
  linux-image-5.19.0-1017-aws     5.19.0-1017.18
  linux-image-5.19.0-29-generic   5.19.0-29.30
  linux-image-5.19.0-29-generic-64k  5.19.0-29.30
  linux-image-5.19.0-29-generic-lpae  5.19.0-29.30
  linux-image-aws                 5.19.0.1017.14
  linux-image-gcp                 5.19.0.1015.12
  linux-image-generic             5.19.0.29.26
  linux-image-generic-64k         5.19.0.29.26
  linux-image-generic-lpae        5.19.0.29.26
  linux-image-ibm                 5.19.0.1015.12
  linux-image-kvm                 5.19.0.1016.13
  linux-image-oem-22.04           5.19.0.29.26
  linux-image-oracle              5.19.0.1015.12
  linux-image-virtual             5.19.0.29.26

Ubuntu 22.04 LTS:
  linux-image-5.15.0-1023-ibm     5.15.0-1023.26
  linux-image-5.15.0-1023-raspi   5.15.0-1023.25
  linux-image-5.15.0-1023-raspi-nolpae  5.15.0-1023.25
  linux-image-5.15.0-1026-kvm     5.15.0-1026.31
  linux-image-5.15.0-1027-gcp     5.15.0-1027.34
  linux-image-5.15.0-1027-oracle  5.15.0-1027.33
  linux-image-5.15.0-1028-aws     5.15.0-1028.32
  linux-image-5.15.0-1031-azure   5.15.0-1031.38
  linux-image-5.15.0-58-generic   5.15.0-58.64
  linux-image-5.15.0-58-generic-64k  5.15.0-58.64
  linux-image-5.15.0-58-generic-lpae  5.15.0-58.64
  linux-image-aws                 5.15.0.1028.26
  linux-image-aws-lts-22.04       5.15.0.1028.26
  linux-image-azure               5.15.0.1031.27
  linux-image-azure-lts-22.04     5.15.0.1031.27
  linux-image-gcp                 5.15.0.1027.22
  linux-image-generic             5.15.0.58.56
  linux-image-generic-64k         5.15.0.58.56
  linux-image-generic-64k-hwe-22.04  5.15.0.58.56
  linux-image-generic-hwe-22.04   5.15.0.58.56
  linux-image-generic-lpae        5.15.0.58.56
  linux-image-generic-lpae-hwe-22.04  5.15.0.58.56
  linux-image-ibm                 5.15.0.1023.19
  linux-image-kvm                 5.15.0.1026.22
  linux-image-oem-20.04           5.15.0.58.56
  linux-image-oracle              5.15.0.1027.22
  linux-image-raspi               5.15.0.1023.20
  linux-image-raspi-nolpae        5.15.0.1023.20
  linux-image-virtual             5.15.0.58.56
  linux-image-virtual-hwe-22.04   5.15.0.58.56

Ubuntu 20.04 LTS:
  linux-image-5.15.0-1027-gcp     5.15.0-1027.34~20.04.1
  linux-image-5.15.0-1028-aws     5.15.0-1028.32~20.04.1
  linux-image-5.15.0-1031-azure   5.15.0-1031.38~20.04.1
  linux-image-5.15.0-58-generic   5.15.0-58.64~20.04.1
  linux-image-5.15.0-58-generic-64k  5.15.0-58.64~20.04.1
  linux-image-5.15.0-58-generic-lpae  5.15.0-58.64~20.04.1
  linux-image-aws                 5.15.0.1028.32~20.04.17
  linux-image-azure               5.15.0.1031.38~20.04.21
  linux-image-gcp                 5.15.0.1027.34~20.04.1
  linux-image-generic-64k-hwe-20.04  5.15.0.58.64~20.04.24
  linux-image-generic-hwe-20.04   5.15.0.58.64~20.04.24
  linux-image-generic-lpae-hwe-20.04  5.15.0.58.64~20.04.24
  linux-image-virtual-hwe-20.04   5.15.0.58.64~20.04.24

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-5803-1
  CVE-2022-3643, CVE-2022-42896, CVE-2022-4378, CVE-2022-45934

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.19.0-29.30
  https://launchpad.net/ubuntu/+source/linux-aws/5.19.0-1017.18
  https://launchpad.net/ubuntu/+source/linux-gcp/5.19.0-1015.16
  https://launchpad.net/ubuntu/+source/linux-ibm/5.19.0-1015.16
  https://launchpad.net/ubuntu/+source/linux-kvm/5.19.0-1016.17
  https://launchpad.net/ubuntu/+source/linux-oracle/5.19.0-1015.17
  https://launchpad.net/ubuntu/+source/linux/5.15.0-58.64
  https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1028.32
  https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1031.38
  https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1027.34
  https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1023.26
  https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1026.31
  https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1027.33
  https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1023.25
  https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1028.32~20.04.1
  https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1031.38~20.04.1
  https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1027.34~20.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-58.64~20.04.1