1. Ubuntu Security Notices
  2. USN-5592-1

USN-5592-1: Linux kernel vulnerabilities

Publication date

1 September 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-bluefield - Linux kernel for NVIDIA BlueField platforms
  • 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-ibm - Linux kernel for IBM cloud systems
  • linux-ibm-5.4 - Linux kernel for IBM cloud systems
  • linux-kvm - Linux kernel for cloud environments
  • linux-oracle - Linux kernel for Oracle Cloud systems
  • linux-oracle-5.4 - Linux kernel for Oracle Cloud systems

Details

Asaf Modelevsky discovered that the Intel(R) 10GbE PCI Express (ixgbe)
Ethernet driver for the Linux kernel performed insufficient control flow
management. A local attacker could possibly use this to cause a denial of
service. (CVE-2021-33061)

It was discovered that the virtual terminal driver in the Linux kernel did
not properly handle VGA console font changes, leading to an out-of-bounds
write. A local attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2021-33656)

Asaf Modelevsky discovered that the Intel(R) 10GbE PCI Express (ixgbe)
Ethernet driver for the Linux kernel performed insufficient control flow
management. A local attacker could possibly use this to cause a denial of
service. (CVE-2021-33061)

It was discovered that the virtual terminal driver in the Linux kernel did
not properly handle VGA console font changes, leading to an out-of-bounds
write. A local attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2021-33656)

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 –  5.4.0.1052.53
linux-image-5.4.0-1081-gke –  5.4.0-1081.87
linux-image-5.4.0-1032-ibm –  5.4.0-1032.36
linux-image-5.4.0-1090-azure –  5.4.0-1090.95
linux-image-bluefield –  5.4.0.1045.44
linux-image-ibm-lts-20.04 –  5.4.0.1032.61
linux-image-azure-lts-20.04 –  5.4.0.1090.87
linux-image-5.4.0-1082-oracle –  5.4.0-1082.90
linux-image-5.4.0-1045-bluefield –  5.4.0-1045.50
linux-image-gkeop-5.4 –  5.4.0.1052.53
linux-image-gke –  5.4.0.1081.89
linux-image-ibm –  5.4.0.1032.61
linux-image-aws-lts-20.04 –  5.4.0.1084.84
linux-image-gcp-lts-20.04 –  5.4.0.1087.92
linux-image-5.4.0-1052-gkeop –  5.4.0-1052.55
linux-image-oracle-lts-20.04 –  5.4.0.1082.79
linux-image-5.4.0-1074-kvm –  5.4.0-1074.79
linux-image-gke-5.4 –  5.4.0.1081.89
linux-image-5.4.0-1084-aws –  5.4.0-1084.91
linux-image-kvm –  5.4.0.1074.71
linux-image-5.4.0-1087-gcp –  5.4.0-1087.95
18.04 bionic linux-image-5.4.0-1087-gcp –  5.4.0-1087.95~18.04.1
linux-image-oracle –  5.4.0.1082.90~18.04.59
linux-image-ibm –  5.4.0.1032.46
linux-image-5.4.0-1032-ibm –  5.4.0-1032.36~18.04.1
linux-image-5.4.0-1082-oracle –  5.4.0-1082.90~18.04.1
linux-image-gcp –  5.4.0.1087.66

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 ›