==========================================================================
Ubuntu Security Notice USN-6024-1
April 19, 2023

linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.19, linux-kvm,
linux-lowlatency, linux-oracle, linux-raspi vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.10
- Ubuntu 22.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) 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-hwe-5.19: Linux hardware enablement (HWE) kernel

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)

Lin Ma discovered a race condition in the io_uring subsystem in the Linux
kernel, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-0468)

It was discovered that a use-after-free vulnerability existed in the SGI
GRU driver in the Linux kernel. A local attacker could possibly use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2022-3424)

Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel did not
properly perform reference counting in some situations, 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-2022-41218)

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)

Thadeu Cascardo discovered that the io_uring subsystem contained a double-
free vulnerability in certain memory allocation error conditions. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2023-1032)

It was discovered that the module decompression implementation 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-2023-22997)

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)

It was discovered that the NTFS file system implementation in the Linux
kernel did not properly handle a loop termination condition, leading to an
out-of-bounds read vulnerability. A local attacker could use this to cause
a denial of service (system crash) or possibly expose sensitive
information. (CVE-2023-26606)

Wei Chen discovered that the DVB USB AZ6027 driver in the Linux kernel
contained a null pointer dereference when handling certain messages from
user space. A local attacker could use this to cause a denial of service
(system crash). (CVE-2023-28328)

Update instructions:

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

Ubuntu 22.10:
   linux-image-5.19.0-1016-raspi   5.19.0-1016.23
   linux-image-5.19.0-1016-raspi-nolpae  5.19.0-1016.23
   linux-image-5.19.0-1020-gcp     5.19.0-1020.22
   linux-image-5.19.0-1020-oracle  5.19.0-1020.23
   linux-image-5.19.0-1021-kvm     5.19.0-1021.22
   linux-image-5.19.0-1022-lowlatency  5.19.0-1022.23
   linux-image-5.19.0-1022-lowlatency-64k  5.19.0-1022.23
   linux-image-5.19.0-1023-aws     5.19.0-1023.24
   linux-image-5.19.0-1023-azure   5.19.0-1023.24
   linux-image-5.19.0-40-generic   5.19.0-40.41
   linux-image-5.19.0-40-generic-64k  5.19.0-40.41
   linux-image-5.19.0-40-generic-lpae  5.19.0-40.41
   linux-image-aws                 5.19.0.1023.20
   linux-image-azure               5.19.0.1023.19
   linux-image-gcp                 5.19.0.1020.17
   linux-image-generic             5.19.0.40.36
   linux-image-generic-64k         5.19.0.40.36
   linux-image-generic-lpae        5.19.0.40.36
   linux-image-kvm                 5.19.0.1021.18
   linux-image-lowlatency          5.19.0.1022.18
   linux-image-lowlatency-64k      5.19.0.1022.18
   linux-image-oracle              5.19.0.1020.17
   linux-image-raspi               5.19.0.1016.15
   linux-image-raspi-nolpae        5.19.0.1016.15
   linux-image-virtual             5.19.0.40.36

Ubuntu 22.04 LTS:
   linux-image-5.19.0-40-generic   5.19.0-40.41~22.04.1
   linux-image-5.19.0-40-generic-64k  5.19.0-40.41~22.04.1
   linux-image-5.19.0-40-generic-lpae  5.19.0-40.41~22.04.1
   linux-image-generic-64k-hwe-22.04  5.19.0.40.41~22.04.13
   linux-image-generic-hwe-22.04   5.19.0.40.41~22.04.13
   linux-image-generic-lpae-hwe-22.04  5.19.0.40.41~22.04.13
   linux-image-virtual-hwe-22.04   5.19.0.40.41~22.04.13

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-6024-1
   CVE-2022-3424, CVE-2022-41218, CVE-2022-47929, CVE-2023-0468,
   CVE-2023-1032, CVE-2023-1281, CVE-2023-22997, CVE-2023-26545,
   CVE-2023-26606, CVE-2023-28328

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.19.0-40.41
   https://launchpad.net/ubuntu/+source/linux-aws/5.19.0-1023.24
   https://launchpad.net/ubuntu/+source/linux-azure/5.19.0-1023.24
   https://launchpad.net/ubuntu/+source/linux-gcp/5.19.0-1020.22
   https://launchpad.net/ubuntu/+source/linux-kvm/5.19.0-1021.22
   https://launchpad.net/ubuntu/+source/linux-lowlatency/5.19.0-1022.23
   https://launchpad.net/ubuntu/+source/linux-oracle/5.19.0-1020.23
   https://launchpad.net/ubuntu/+source/linux-raspi/5.19.0-1016.23
   https://launchpad.net/ubuntu/+source/linux-hwe-5.19/5.19.0-40.41~22.04.1