=========================================================================Ubuntu Security Notice USN-5814-1
January 19, 2023

linux-azure, linux-gkeop, linux-intel-iotg, linux-lowlatency,
linux-lowlatency-hwe-5.15, linux-oracle-5.15 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-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-lowlatency: Linux low latency kernel
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-intel-iotg: Linux kernel for Intel IoT platforms
- linux-lowlatency-hwe-5.15: Linux low latency kernel
- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

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-lowlatency  5.19.0-1015.16
   linux-image-5.19.0-1015-lowlatency-64k  5.19.0-1015.16
   linux-image-5.19.0-1017-azure   5.19.0-1017.18
   linux-image-azure               5.19.0.1017.13
   linux-image-lowlatency          5.19.0.1015.12
   linux-image-lowlatency-64k      5.19.0.1015.12

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1013-gkeop   5.15.0-1013.17
   linux-image-5.15.0-1023-intel-iotg  5.15.0-1023.28
   linux-image-5.15.0-58-lowlatency  5.15.0-58.64
   linux-image-5.15.0-58-lowlatency-64k  5.15.0-58.64
   linux-image-gkeop               5.15.0.1013.12
   linux-image-gkeop-5.15          5.15.0.1013.12
   linux-image-intel-iotg          5.15.0.1023.22
   linux-image-lowlatency          5.15.0.58.51
   linux-image-lowlatency-64k      5.15.0.58.51
   linux-image-lowlatency-64k-hwe-22.04  5.15.0.58.51
   linux-image-lowlatency-hwe-22.04  5.15.0.58.51

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1027-oracle  5.15.0-1027.33~20.04.1
   linux-image-5.15.0-58-lowlatency  5.15.0-58.64~20.04.1
   linux-image-5.15.0-58-lowlatency-64k  5.15.0-58.64~20.04.1
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.58.64~20.04.21
   linux-image-lowlatency-hwe-20.04  5.15.0.58.64~20.04.21
   linux-image-oracle              5.15.0.1027.33~20.04.1

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-5814-1
   CVE-2022-3643, CVE-2022-42896, CVE-2022-4378, CVE-2022-45934

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure/5.19.0-1017.18
   https://launchpad.net/ubuntu/+source/linux-lowlatency/5.19.0-1015.16
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1013.17
   https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1023.28
   https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-58.64
 
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-58.64~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1027.33~20.04.1