==========================================================================
Ubuntu Security Notice USN-6704-1
March 20, 2024

linux, linux-azure, linux-azure-5.15, linux-azure-fde,
linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop,
linux-gkeop-5.15, linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm,
linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia 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-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-nvidia: Linux kernel for NVIDIA systems
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
- linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM 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-lowlatency-hwe-5.15: Linux low latency kernel

Details:

It was discovered that the NVIDIA Tegra XUSB pad controller driver in the
Linux kernel did not properly handle return values in certain error
conditions. A local attacker could use this to cause a denial of service
(system crash). (CVE-2023-23000)

Quentin Minster discovered that the KSMBD implementation in the Linux
kernel did not properly handle session setup requests. A remote attacker
could possibly use this to cause a denial of service (memory exhaustion).
(CVE-2023-32247)

Lonial Con discovered that the netfilter subsystem in the Linux kernel did
not properly handle element deactivation in certain cases, 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-2024-1085)

Notselwyn discovered that the netfilter subsystem in the Linux kernel did
not properly handle verdict parameters in certain cases, 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-2024-1086)

It was discovered that a race condition existed in the SCSI Emulex
LightPulse Fibre Channel driver in the Linux kernel when unregistering FCF
and re-scanning an HBA FCF table, leading to a null pointer dereference
vulnerability. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-24855)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-101-generic  5.15.0-101.111
   linux-image-5.15.0-101-generic-64k  5.15.0-101.111
   linux-image-5.15.0-101-generic-lpae  5.15.0-101.111
   linux-image-5.15.0-101-lowlatency  5.15.0-101.111
   linux-image-5.15.0-101-lowlatency-64k  5.15.0-101.111
   linux-image-5.15.0-1039-gkeop   5.15.0-1039.45
   linux-image-5.15.0-1047-nvidia  5.15.0-1047.47
   linux-image-5.15.0-1047-nvidia-lowlatency  5.15.0-1047.47
   linux-image-5.15.0-1049-ibm     5.15.0-1049.52
   linux-image-5.15.0-1053-gke     5.15.0-1053.58
   linux-image-5.15.0-1053-kvm     5.15.0-1053.58
   linux-image-5.15.0-1054-gcp     5.15.0-1054.62
   linux-image-5.15.0-1059-azure   5.15.0-1059.67
   linux-image-5.15.0-1059-azure-fde  5.15.0-1059.67.1
   linux-image-azure-fde-lts-22.04  5.15.0.1059.67.37
   linux-image-azure-lts-22.04     5.15.0.1059.55
   linux-image-gcp-lts-22.04       5.15.0.1054.50
   linux-image-generic             5.15.0.101.98
   linux-image-generic-64k         5.15.0.101.98
   linux-image-generic-lpae        5.15.0.101.98
   linux-image-gke                 5.15.0.1053.52
   linux-image-gke-5.15            5.15.0.1053.52
   linux-image-gkeop               5.15.0.1039.38
   linux-image-gkeop-5.15          5.15.0.1039.38
   linux-image-ibm                 5.15.0.1049.45
   linux-image-kvm                 5.15.0.1053.49
   linux-image-lowlatency          5.15.0.101.97
   linux-image-lowlatency-64k      5.15.0.101.97
   linux-image-nvidia              5.15.0.1047.47
   linux-image-nvidia-lowlatency   5.15.0.1047.47
   linux-image-virtual             5.15.0.101.98

Ubuntu 20.04 LTS:
   linux-image-5.15.0-101-generic  5.15.0-101.111~20.04.1
   linux-image-5.15.0-101-generic-64k  5.15.0-101.111~20.04.1
   linux-image-5.15.0-101-generic-lpae  5.15.0-101.111~20.04.1
   linux-image-5.15.0-101-lowlatency  5.15.0-101.111~20.04.1
   linux-image-5.15.0-101-lowlatency-64k  5.15.0-101.111~20.04.1
   linux-image-5.15.0-1039-gkeop   5.15.0-1039.45~20.04.1
   linux-image-5.15.0-1049-ibm     5.15.0-1049.52~20.04.1
   linux-image-5.15.0-1054-gcp     5.15.0-1054.62~20.04.1
   linux-image-5.15.0-1059-azure   5.15.0-1059.67~20.04.1
   linux-image-5.15.0-1059-azure-fde  5.15.0-1059.67~20.04.1.1
   linux-image-azure               5.15.0.1059.67~20.04.49
   linux-image-azure-cvm           5.15.0.1059.67~20.04.49
   linux-image-azure-fde           5.15.0.1059.67~20.04.1.38
   linux-image-gcp                 5.15.0.1054.62~20.04.1
   linux-image-generic-64k-hwe-20.04  5.15.0.101.111~20.04.53
   linux-image-generic-hwe-20.04   5.15.0.101.111~20.04.53
   linux-image-generic-lpae-hwe-20.04  5.15.0.101.111~20.04.53
   linux-image-gkeop-5.15          5.15.0.1039.45~20.04.35
   linux-image-ibm                 5.15.0.1049.52~20.04.21
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.101.111~20.04.50
   linux-image-lowlatency-hwe-20.04  5.15.0.101.111~20.04.50
   linux-image-oem-20.04           5.15.0.101.111~20.04.53
   linux-image-oem-20.04b          5.15.0.101.111~20.04.53
   linux-image-oem-20.04c          5.15.0.101.111~20.04.53
   linux-image-oem-20.04d          5.15.0.101.111~20.04.53
   linux-image-virtual-hwe-20.04   5.15.0.101.111~20.04.53

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-6704-1
   CVE-2023-23000, CVE-2023-32247, CVE-2024-1085, CVE-2024-1086,
   CVE-2024-24855

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.15.0-101.111
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1059.67
   https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1059.67.1
   https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1054.62
   https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1053.58
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1039.45
   https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1049.52
   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1053.58
   https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-101.111
   https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1047.47
   https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1059.67~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1059.67~20.04.1.1
   https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1054.62~20.04.1
   https://launchpad.net/ubuntu/+source/linux-gkeop-5.15/5.15.0-1039.45~20.04.1
   https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-101.111~20.04.1
   https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1049.52~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-101.111~20.04.1