==========================================================================
Ubuntu Security Notice USN-6653-1
February 23, 2024

linux, linux-azure, linux-azure-5.15, linux-azure-fde, linux-gcp,
linux-gcp-5.15, linux-gkeop, linux-gkeop-5.15, linux-hwe-5.15, linux-ibm,
linux-ibm-5.15, linux-intel-iotg, linux-intel-iotg-5.15, linux-kvm,
linux-lowlatency-hwe-5.15, linux-nvidia, 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-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-intel-iotg: Linux kernel for Intel IoT platforms
- linux-kvm: Linux kernel for cloud environments
- linux-nvidia: Linux kernel for NVIDIA systems
- 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-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop-5.15: Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel
- linux-ibm-5.15: Linux kernel for IBM cloud systems
- linux-intel-iotg-5.15: 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:

It was discovered that a race condition existed in the ATM (Asynchronous
Transfer Mode) subsystem of 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-2023-51780)

It was discovered that a race condition existed in the AppleTalk networking
subsystem of 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-2023-51781)

Zhenghan Wang discovered that the generic ID allocator implementation in
the Linux kernel did not properly check for null bitmap when releasing IDs.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2023-6915)

Robert Morris discovered that the CIFS network file system implementation
in the Linux kernel did not properly validate certain server commands
fields, leading to an out-of-bounds read vulnerability. An attacker could
use this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2024-0565)

Jann Horn discovered that the TLS subsystem in the Linux kernel did not
properly handle spliced messages, leading to an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2024-0646)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1037-gkeop   5.15.0-1037.43
   linux-image-5.15.0-1045-nvidia  5.15.0-1045.45
   linux-image-5.15.0-1045-nvidia-lowlatency  5.15.0-1045.45
   linux-image-5.15.0-1047-ibm     5.15.0-1047.50
   linux-image-5.15.0-1047-raspi   5.15.0-1047.50
   linux-image-5.15.0-1049-intel-iotg  5.15.0-1049.55
   linux-image-5.15.0-1051-kvm     5.15.0-1051.56
   linux-image-5.15.0-1052-gcp     5.15.0-1052.60
   linux-image-5.15.0-1052-oracle  5.15.0-1052.58
   linux-image-5.15.0-1057-azure   5.15.0-1057.65
   linux-image-5.15.0-1057-azure-fde  5.15.0-1057.65.1
   linux-image-5.15.0-97-generic   5.15.0-97.107
   linux-image-5.15.0-97-generic-64k  5.15.0-97.107
   linux-image-5.15.0-97-generic-lpae  5.15.0-97.107
   linux-image-azure-fde-lts-22.04  5.15.0.1057.65.35
   linux-image-azure-lts-22.04     5.15.0.1057.53
   linux-image-gcp-lts-22.04       5.15.0.1052.48
   linux-image-generic             5.15.0.97.92
   linux-image-generic-64k         5.15.0.97.92
   linux-image-generic-lpae        5.15.0.97.92
   linux-image-gkeop               5.15.0.1037.36
   linux-image-gkeop-5.15          5.15.0.1037.36
   linux-image-ibm                 5.15.0.1047.43
   linux-image-intel-iotg          5.15.0.1049.49
   linux-image-kvm                 5.15.0.1051.47
   linux-image-nvidia              5.15.0.1045.45
   linux-image-nvidia-lowlatency   5.15.0.1045.45
   linux-image-oracle              5.15.0.1052.47
   linux-image-oracle-lts-22.04    5.15.0.1052.47
   linux-image-raspi               5.15.0.1047.45
   linux-image-raspi-nolpae        5.15.0.1047.45
   linux-image-virtual             5.15.0.97.92

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1037-gkeop   5.15.0-1037.43~20.04.1
   linux-image-5.15.0-1047-ibm     5.15.0-1047.50~20.04.1
   linux-image-5.15.0-1049-intel-iotg  5.15.0-1049.55~20.04.1
   linux-image-5.15.0-1052-gcp     5.15.0-1052.60~20.04.1
   linux-image-5.15.0-1052-oracle  5.15.0-1052.58~20.04.1
   linux-image-5.15.0-1057-azure   5.15.0-1057.65~20.04.1
   linux-image-5.15.0-97-generic   5.15.0-97.107~20.04.1
   linux-image-5.15.0-97-generic-64k  5.15.0-97.107~20.04.1
   linux-image-5.15.0-97-generic-lpae  5.15.0-97.107~20.04.1
   linux-image-5.15.0-97-lowlatency  5.15.0-97.107~20.04.1
   linux-image-5.15.0-97-lowlatency-64k  5.15.0-97.107~20.04.1
   linux-image-azure               5.15.0.1057.65~20.04.46
   linux-image-azure-cvm           5.15.0.1057.65~20.04.46
   linux-image-gcp                 5.15.0.1052.60~20.04.1
   linux-image-generic-64k-hwe-20.04  5.15.0.97.107~20.04.51
   linux-image-generic-hwe-20.04   5.15.0.97.107~20.04.51
   linux-image-generic-lpae-hwe-20.04  5.15.0.97.107~20.04.51
   linux-image-gkeop-5.15          5.15.0.1037.43~20.04.33
   linux-image-ibm                 5.15.0.1047.50~20.04.19
   linux-image-intel               5.15.0.1049.55~20.04.39
   linux-image-intel-iotg          5.15.0.1049.55~20.04.39
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.97.107~20.04.48
   linux-image-lowlatency-hwe-20.04  5.15.0.97.107~20.04.48
   linux-image-oem-20.04           5.15.0.97.107~20.04.51
   linux-image-oem-20.04b          5.15.0.97.107~20.04.51
   linux-image-oem-20.04c          5.15.0.97.107~20.04.51
   linux-image-oem-20.04d          5.15.0.97.107~20.04.51
   linux-image-oracle              5.15.0.1052.58~20.04.1
   linux-image-virtual-hwe-20.04   5.15.0.97.107~20.04.51

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-6653-1
   CVE-2023-51780, CVE-2023-51781, CVE-2023-6915, CVE-2024-0565,
   CVE-2024-0646

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.15.0-97.107
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1057.65
   https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1057.65.1
   https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1052.60
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1037.43
   https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1047.50
   https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1049.55
   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1051.56
   https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1045.45
   https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1052.58
   https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1047.50
   https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1057.65~20.04.1
   https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1052.60~20.04.1
   https://launchpad.net/ubuntu/+source/linux-gkeop-5.15/5.15.0-1037.43~20.04.1
   https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-97.107~20.04.1
   https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1047.50~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-intel-iotg-5.15/5.15.0-1049.55~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-97.107~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1052.58~20.04.1