1. Ubuntu Security Notices
  2. USN-5589-1

USN-5589-1: Linux kernel vulnerabilities

Publication date

30 August 2022

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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-virtual –  5.4.0.125.126
linux-image-generic –  5.4.0.125.126
linux-image-oem –  5.4.0.125.126
linux-image-oem-osp1 –  5.4.0.125.126
linux-image-5.4.0-125-generic-lpae –  5.4.0-125.141
linux-image-5.4.0-125-generic –  5.4.0-125.141
linux-image-raspi2 –  5.4.0.1069.102
linux-image-5.4.0-1069-raspi –  5.4.0-1069.79
linux-image-raspi –  5.4.0.1069.102
linux-image-5.4.0-125-lowlatency –  5.4.0-125.141
linux-image-generic-lpae –  5.4.0.125.126
linux-image-lowlatency –  5.4.0.125.126

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References

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