==========================================================================
Ubuntu Security Notice USN-6025-1
April 19, 2023

linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15,
linux-azure-fde, linux-gcp, linux-gcp-5.15, linux-gke, linux-gke-5.15,
linux-gkeop, 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-aws: Linux kernel for Amazon Web Services (AWS) systems
- 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-oracle: Linux kernel for Oracle 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-gke-5.15: Linux kernel for Google Container Engine (GKE) systems
- linux-lowlatency-hwe-5.15: Linux low latency kernel
- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the Traffic-Control Index (TCINDEX) implementation
in the Linux kernel contained 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-2023-1281)

It was discovered that the OverlayFS implementation in the Linux kernel did
not properly handle copy up operation in some conditions. A local attacker
could possibly use this to gain elevated privileges. (CVE-2023-0386)

Haowei Yan discovered that a race condition existed in the Layer 2
Tunneling Protocol (L2TP) implementation in the Linux kernel. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2022-4129)

It was discovered that the network queuing discipline implementation in the
Linux kernel contained a null pointer dereference in some situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2022-47929)

It was discovered that the NTFS file system implementation in the Linux
kernel contained a null pointer dereference in some situations. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-4842)

Kyle Zeng discovered that the IPv6 implementation in the Linux kernel
contained a NULL pointer dereference vulnerability in certain situations. A
local attacker could use this to cause a denial of service (system crash).
(CVE-2023-0394)

It was discovered that the Human Interface Device (HID) support driver in
the Linux kernel contained a type confusion vulnerability in some
situations. A local attacker could use this to cause a denial of service
(system crash). (CVE-2023-1073)

It was discovered that a memory leak existed in the SCTP protocol
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (memory exhaustion). (CVE-2023-1074)

It was discovered that the NFS implementation in the Linux kernel did not
properly handle pending tasks in some situations. A local attacker could
use this to cause a denial of service (system crash) or expose sensitive
information (kernel memory). (CVE-2023-1652)

Lianhui Tang discovered that the MPLS implementation in the Linux kernel
did not properly handle certain sysctl allocation failure conditions,
leading to a double-free vulnerability. An attacker could use this to cause
a denial of service or possibly execute arbitrary code. (CVE-2023-26545)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1018-gkeop   5.15.0-1018.23
   linux-image-5.15.0-1027-raspi   5.15.0-1027.29
   linux-image-5.15.0-1027-raspi-nolpae  5.15.0-1027.29
   linux-image-5.15.0-1028-ibm     5.15.0-1028.31
   linux-image-5.15.0-1031-gke     5.15.0-1031.36
   linux-image-5.15.0-1031-kvm     5.15.0-1031.36
   linux-image-5.15.0-1032-gcp     5.15.0-1032.40
   linux-image-5.15.0-1033-oracle  5.15.0-1033.39
   linux-image-5.15.0-1034-aws     5.15.0-1034.38
   linux-image-5.15.0-1036-azure   5.15.0-1036.43
   linux-image-5.15.0-1036-azure-fde  5.15.0-1036.43.1
   linux-image-5.15.0-70-generic   5.15.0-70.77
   linux-image-5.15.0-70-generic-64k  5.15.0-70.77
   linux-image-5.15.0-70-generic-lpae  5.15.0-70.77
   linux-image-5.15.0-70-lowlatency  5.15.0-70.77
   linux-image-5.15.0-70-lowlatency-64k  5.15.0-70.77
   linux-image-aws-lts-22.04       5.15.0.1034.33
   linux-image-azure               5.15.0.1036.32
   linux-image-azure-fde           5.15.0.1036.43.13
   linux-image-azure-lts-22.04     5.15.0.1036.32
   linux-image-gcp                 5.15.0.1032.27
   linux-image-generic             5.15.0.70.68
   linux-image-generic-64k         5.15.0.70.68
   linux-image-generic-lpae        5.15.0.70.68
   linux-image-gke                 5.15.0.1031.30
   linux-image-gke-5.15            5.15.0.1031.30
   linux-image-gkeop               5.15.0.1018.17
   linux-image-gkeop-5.15          5.15.0.1018.17
   linux-image-ibm                 5.15.0.1028.24
   linux-image-kvm                 5.15.0.1031.27
   linux-image-lowlatency          5.15.0.70.75
   linux-image-lowlatency-64k      5.15.0.70.75
   linux-image-oracle              5.15.0.1033.28
   linux-image-raspi               5.15.0.1027.24
   linux-image-raspi-nolpae        5.15.0.1027.24
   linux-image-virtual             5.15.0.70.68

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1031-gke     5.15.0-1031.36~20.04.1
   linux-image-5.15.0-1032-gcp     5.15.0-1032.40~20.04.1
   linux-image-5.15.0-1033-oracle  5.15.0-1033.39~20.04.1
   linux-image-5.15.0-1034-aws     5.15.0-1034.38~20.04.1
   linux-image-5.15.0-1036-azure   5.15.0-1036.43~20.04.1
   linux-image-5.15.0-70-lowlatency  5.15.0-70.77~20.04.1
   linux-image-5.15.0-70-lowlatency-64k  5.15.0-70.77~20.04.1
   linux-image-aws                 5.15.0.1034.38~20.04.23
   linux-image-azure               5.15.0.1036.43~20.04.26
   linux-image-azure-cvm           5.15.0.1036.43~20.04.26
   linux-image-gcp                 5.15.0.1032.40~20.04.1
   linux-image-gke-5.15            5.15.0.1031.36~20.04.1
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.70.77~20.04.28
   linux-image-lowlatency-hwe-20.04  5.15.0.70.77~20.04.28
   linux-image-oracle              5.15.0.1033.39~20.04.1

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-6025-1
   CVE-2022-4129, CVE-2022-47929, CVE-2022-4842, CVE-2023-0386,
   CVE-2023-0394, CVE-2023-1073, CVE-2023-1074, CVE-2023-1281,
   CVE-2023-1652, CVE-2023-26545

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.15.0-70.77
   https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1034.38
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1036.43
   https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1036.43.1
   https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1032.40
   https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1031.36
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1018.23
   https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1028.31
   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1031.36
   https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-70.77
   https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1033.39
   https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1027.29
   https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1034.38~20.04.1
   https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1036.43~20.04.1
   https://launchpad.net/ubuntu/+source/linux-gcp-5.15/5.15.0-1032.40~20.04.1
   https://launchpad.net/ubuntu/+source/linux-gke-5.15/5.15.0-1031.36~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-5.15/5.15.0-70.77~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1033.39~20.04.1