Ubuntu 20.04 & 18.04 USN-5442-2 Critical: Kernel Security Issues

ubuntu

June 1, 2022

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems

- linux-gkeop-5.4: Linux kernel for Google Container Engine (GKE) systems

- linux-ibm-5.4: Linux kernel for IBM cloud systems

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Kyle Zeng discovered that the Network Queuing and Scheduling subsystem of

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 execute

arbitrary code. (CVE-2022-29581)

Bing-Jhong Billy Jheng discovered that the io_uring subsystem in the Linux

kernel contained in inte...

Read the Full Advisory

Topics Covered

security advisory denial of service critical issue kernel update ubuntu software issues linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1043-gkeop    5.4.0-1043.44
  linux-image-5.4.0-1062-raspi    5.4.0-1062.70
  linux-image-5.4.0-1073-oracle   5.4.0-1073.79
  linux-image-gkeop               5.4.0.1043.46
  linux-image-gkeop-5.4           5.4.0.1043.46
  linux-image-oracle-lts-20.04    5.4.0.1073.73
  linux-image-raspi               5.4.0.1062.96
  linux-image-raspi2              5.4.0.1062.96

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1023-ibm      5.4.0-1023.25~18.04.1
  linux-image-5.4.0-1043-gkeop    5.4.0-1043.44~18.04.1
  linux-image-5.4.0-1062-raspi    5.4.0-1062.70~18.04.1
  linux-image-5.4.0-1073-oracle   5.4.0-1073.79~18.04.1
  linux-image-5.4.0-1075-gcp      5.4.0-1075.80~18.04.1
  linux-image-gcp                 5.4.0.1075.58
  linux-image-gkeop-5.4           5.4.0.1043.44~18.04.42
  linux-image-ibm                 5.4.0.1023.39
  linux-image-oracle              5.4.0.1073.79~18.04.52
  linux-image-raspi-hwe-18.04     5.4.0.1062.63

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.