USN-6094-1: Linux kernel vulnerabilities

Publication date

22 May 2023

Overview

Several security issues were fixed in the Linux kernel.


Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-5.4 - 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-hwe-5.4 - Linux hardware enablement (HWE) kernel
  • linux-ibm - Linux kernel for IBM cloud systems
  • linux-ibm-5.4 - Linux kernel for IBM cloud systems
  • linux-kvm - Linux kernel for cloud environments

Details

Zheng Wang discovered that the Intel i915 graphics driver in the Linux
kernel did not properly handle certain error conditions, leading to a
double-free. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2022-3707)

Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did
not properly implement speculative execution barriers in usercopy functions
in certain situations. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2023-0459)

It was discovered that the TLS subsystem 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) or possibly expose
sensitive information. (CVE-2023-1075)

It was discovered that the Reliable...

Zheng Wang discovered that the Intel i915 graphics driver in the Linux
kernel did not properly handle certain error conditions, leading to a
double-free. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2022-3707)

Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did
not properly implement speculative execution barriers in usercopy functions
in certain situations. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2023-0459)

It was discovered that the TLS subsystem 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) or possibly expose
sensitive information. (CVE-2023-1075)

It was discovered that the Reliable Datagram Sockets (RDS) protocol
implementation in the Linux kernel contained a type confusion vulnerability
in some situations. An attacker could use this to cause a denial of service
(system crash). (CVE-2023-1078)

Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel
did not properly initialize some data structures. A local attacker could
use this to expose sensitive information (kernel memory). (CVE-2023-1513)

It was discovered that a use-after-free vulnerability existed in the iSCSI
TCP implementation in the Linux kernel. A local attacker could possibly use
this to cause a denial of service (system crash). (CVE-2023-2162)

It was discovered that the NET/ROM protocol implementation in the Linux
kernel contained a race condition 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-2023-32269)

Duoming Zhou discovered that a race condition existed in the infrared
receiver/transceiver driver in the Linux kernel, leading to a use-after-
free vulnerability. A privileged attacker could use this to cause a denial
of service (system crash) or possibly execute arbitrary code.
(CVE-2023-1118)


Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
20.04 focal linux-image-gkeop-5.4 –  5.4.0.1069.67
linux-image-virtual –  5.4.0.149.147
linux-image-generic –  5.4.0.149.147
linux-image-5.4.0-1108-azure –  5.4.0-1108.114
linux-image-5.4.0-1099-gke –  5.4.0-1099.106
linux-image-ibm –  5.4.0.1049.75
linux-image-oem-osp1 –  5.4.0.149.147
linux-image-5.4.0-149-generic-lpae –  5.4.0-149.166
linux-image-5.4.0-149-generic –  5.4.0-149.166
linux-image-5.4.0-1049-ibm –  5.4.0-1049.54
linux-image-azure-lts-20.04 –  5.4.0.1108.101
linux-image-gkeop –  5.4.0.1069.67
linux-image-5.4.0-1102-aws –  5.4.0-1102.110
linux-image-5.4.0-1105-gcp –  5.4.0-1105.114
linux-image-ibm-lts-20.04 –  5.4.0.1049.75
linux-image-aws-lts-20.04 –  5.4.0.1102.99
linux-image-gcp-lts-20.04 –  5.4.0.1105.107
linux-image-5.4.0-1091-kvm –  5.4.0-1091.97
linux-image-generic-lpae –  5.4.0.149.147
linux-image-5.4.0-1069-gkeop –  5.4.0-1069.73
linux-image-5.4.0-149-lowlatency –  5.4.0-149.166
linux-image-gke-5.4 –  5.4.0.1099.104
linux-image-gke –  5.4.0.1099.104
linux-image-kvm –  5.4.0.1091.85
linux-image-oem –  5.4.0.149.147
linux-image-lowlatency –  5.4.0.149.147
18.04 bionic linux-image-generic-lpae-hwe-18.04 –  5.4.0.149.166~18.04.120
linux-image-5.4.0-1108-azure –  5.4.0-1108.114~18.04.1
linux-image-generic-hwe-18.04 –  5.4.0.149.166~18.04.120
linux-image-snapdragon-hwe-18.04 –  5.4.0.149.166~18.04.120
linux-image-oem –  5.4.0.149.166~18.04.120
linux-image-ibm –  5.4.0.1049.60
linux-image-oem-osp1 –  5.4.0.149.166~18.04.120
linux-image-5.4.0-149-generic-lpae –  5.4.0-149.166~18.04.1
linux-image-azure –  5.4.0.1108.81
linux-image-5.4.0-1049-ibm –  5.4.0-1049.54~18.04.1
linux-image-5.4.0-1105-gcp –  5.4.0-1105.114~18.04.1
linux-image-virtual-hwe-18.04 –  5.4.0.149.166~18.04.120
linux-image-gcp –  5.4.0.1105.81
linux-image-5.4.0-149-generic –  5.4.0-149.166~18.04.1
linux-image-5.4.0-149-lowlatency –  5.4.0-149.166~18.04.1
linux-image-lowlatency-hwe-18.04 –  5.4.0.149.166~18.04.120

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