1. Ubuntu Security Notices
  2. USN-6130-1

USN-6130-1: Linux kernel vulnerabilities

Publication date

1 June 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-4.15 - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gcp-4.15 - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - Linux kernel for Oracle Cloud systems
  • linux-snapdragon - Linux kernel for Qualcomm Snapdragon processors

Details

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
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-2023-32233)

Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained 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-2023-31436)

Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
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-2023-32233)

Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained 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-2023-31436)

Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-1380)

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
18.04 bionic linux-image-4.15.0-1151-gcp –  4.15.0-1151.167
linux-image-virtual –  4.15.0.212.195
linux-image-aws-lts-18.04 –  4.15.0.1157.155
linux-image-generic –  4.15.0.212.195
linux-image-4.15.0-1151-snapdragon –  4.15.0-1151.161
linux-image-4.15.0-1166-azure –  4.15.0-1166.181
linux-image-4.15.0-1157-aws –  4.15.0-1157.170
linux-image-oracle-lts-18.04 –  4.15.0.1120.125
linux-image-4.15.0-212-lowlatency –  4.15.0-212.223
linux-image-4.15.0-212-generic –  4.15.0-212.223
linux-image-kvm –  4.15.0.1141.132
linux-image-snapdragon –  4.15.0.1151.150
linux-image-azure-lts-18.04 –  4.15.0.1166.134
linux-image-gcp-lts-18.04 –  4.15.0.1151.165
linux-image-4.15.0-1141-kvm –  4.15.0-1141.146
linux-image-4.15.0-212-generic-lpae –  4.15.0-212.223
linux-image-4.15.0-1120-oracle –  4.15.0-1120.131
linux-image-generic-lpae –  4.15.0.212.195
linux-image-lowlatency –  4.15.0.212.195
16.04 xenial linux-image-4.15.0-1151-gcp –  4.15.0-1151.167~16.04.1  
linux-image-oem –  4.15.0.212.197  
linux-image-lowlatency-hwe-16.04 –  4.15.0.212.197  
linux-image-4.15.0-1166-azure –  4.15.0-1166.181~16.04.1  
linux-image-4.15.0-1157-aws –  4.15.0-1157.170~16.04.1  
linux-image-4.15.0-212-lowlatency –  4.15.0-212.223~16.04.1  
linux-image-azure –  4.15.0.1166.150  
linux-image-4.15.0-212-generic –  4.15.0-212.223~16.04.1  
linux-image-gke –  4.15.0.1151.141  
linux-image-gcp –  4.15.0.1151.141  
linux-image-aws-hwe –  4.15.0.1157.140  
linux-image-generic-hwe-16.04 –  4.15.0.212.197  
linux-image-oracle –  4.15.0.1120.101  
linux-image-virtual-hwe-16.04 –  4.15.0.212.197  
linux-image-4.15.0-1120-oracle –  4.15.0-1120.131~16.04.1  
14.04 trusty linux-image-4.15.0-1166-azure –  4.15.0-1166.181~14.04.1  
linux-image-azure –  4.15.0.1166.132  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›