==========================================================================
Ubuntu Security Notice USN-5851-1
February 09, 2023

linux, linux-azure, linux-azure-5.15, linux-gkeop, linux-hwe-5.15,
linux-ibm, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15,
linux-oracle, linux-oracle-5.15, linux-raspi 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-azure: Linux kernel for Microsoft Azure Cloud 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-raspi: Linux kernel for Raspberry Pi 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 memory leak existed in the Unix domain socket
implementation of the Linux kernel. A local attacker could use this to
cause a denial of service (memory exhaustion). (CVE-2022-3543)

It was discovered that the Bluetooth HCI implementation in the Linux kernel
did not properly deallocate memory in some situations. An attacker could
possibly use this cause a denial of service (memory exhaustion).
(CVE-2022-3619)

It was discovered that the hugetlb implementation 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) or expose sensitive
information (kernel memory). (CVE-2022-3623)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform bounds checking in some situations. A
physically proximate attacker could use this to craft a malicious USB
device that when inserted, could cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2022-3628)

It was discovered that a use-after-free vulnerability existed in the
Bluetooth stack in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2022-3640)

It was discovered that a race condition existed in the SMSC UFX USB driver
implementation in the Linux kernel, leading to a use-after-free
vulnerability. A physically proximate attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-41849)

It was discovered that a race condition existed in the Roccat HID 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-2022-41850)

Tamás Koczka discovered that the Bluetooth L2CAP implementation in the
Linux kernel did not properly initialize memory in some situations. A
physically proximate attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2022-42895)

Arnaud Gatignol, Quentin Minster, Florent Saudel and Guillaume Teissier
discovered that the KSMBD implementation in the Linux kernel did not
properly validate user-supplied data in some situations. An authenticated
attacker could use this to cause a denial of service (system crash), expose
sensitive information (kernel memory) or possibly execute arbitrary code.
(CVE-2022-47940)

It was discovered that a race condition existed in the qdisc 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-2023-0590)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1015-gkeop   5.15.0-1015.19
   linux-image-5.15.0-1024-raspi   5.15.0-1024.26
   linux-image-5.15.0-1024-raspi-nolpae  5.15.0-1024.26
   linux-image-5.15.0-1025-ibm     5.15.0-1025.28
   linux-image-5.15.0-1028-kvm     5.15.0-1028.33
   linux-image-5.15.0-1029-oracle  5.15.0-1029.35
   linux-image-5.15.0-1033-azure   5.15.0-1033.40
   linux-image-5.15.0-60-generic   5.15.0-60.66
   linux-image-5.15.0-60-generic-64k  5.15.0-60.66
   linux-image-5.15.0-60-generic-lpae  5.15.0-60.66
   linux-image-5.15.0-60-lowlatency  5.15.0-60.66
   linux-image-5.15.0-60-lowlatency-64k  5.15.0-60.66
   linux-image-azure               5.15.0.1033.29
   linux-image-azure-lts-22.04     5.15.0.1033.29
   linux-image-generic             5.15.0.60.58
   linux-image-generic-64k         5.15.0.60.58
   linux-image-generic-64k-hwe-22.04  5.15.0.60.58
   linux-image-generic-hwe-22.04   5.15.0.60.58
   linux-image-generic-lpae        5.15.0.60.58
   linux-image-generic-lpae-hwe-22.04  5.15.0.60.58
   linux-image-gkeop               5.15.0.1015.14
   linux-image-gkeop-5.15          5.15.0.1015.14
   linux-image-ibm                 5.15.0.1025.21
   linux-image-kvm                 5.15.0.1028.24
   linux-image-lowlatency          5.15.0.60.53
   linux-image-lowlatency-64k      5.15.0.60.53
   linux-image-lowlatency-64k-hwe-22.04  5.15.0.60.53
   linux-image-lowlatency-hwe-22.04  5.15.0.60.53
   linux-image-oracle              5.15.0.1029.24
   linux-image-raspi               5.15.0.1024.21
   linux-image-raspi-nolpae        5.15.0.1024.21
   linux-image-virtual             5.15.0.60.58
   linux-image-virtual-hwe-22.04   5.15.0.60.58

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1029-oracle  5.15.0-1029.35~20.04.1
   linux-image-5.15.0-1033-azure   5.15.0-1033.40~20.04.1
   linux-image-5.15.0-60-generic   5.15.0-60.66~20.04.1
   linux-image-5.15.0-60-generic-64k  5.15.0-60.66~20.04.1
   linux-image-5.15.0-60-generic-lpae  5.15.0-60.66~20.04.1
   linux-image-5.15.0-60-lowlatency  5.15.0-60.66~20.04.1
   linux-image-5.15.0-60-lowlatency-64k  5.15.0-60.66~20.04.1
   linux-image-azure               5.15.0.1033.40~20.04.23
   linux-image-generic-64k-hwe-20.04  5.15.0.60.66~20.04.26
   linux-image-generic-hwe-20.04   5.15.0.60.66~20.04.26
   linux-image-generic-lpae-hwe-20.04  5.15.0.60.66~20.04.26
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.60.66~20.04.23
   linux-image-lowlatency-hwe-20.04  5.15.0.60.66~20.04.23
   linux-image-oracle              5.15.0.1029.35~20.04.1
   linux-image-virtual-hwe-20.04   5.15.0.60.66~20.04.26

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-5851-1
   CVE-2022-3543, CVE-2022-3619, CVE-2022-3623, CVE-2022-3628,
   CVE-2022-3640, CVE-2022-41849, CVE-2022-41850, CVE-2022-42895,
   CVE-2022-47940, CVE-2023-0590

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.15.0-60.66
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1033.40
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1015.19
   https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1025.28
   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1028.33
   https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-60.66
   https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1029.35
   https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1024.26
   https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1033.40~20.04.1
   https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-60.66~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-60.66~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1029.35~20.04.1