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Ubuntu 20.04/18.04 USN-5539-1 Moderate: Linux Kernel System Crash Risk

ubuntu
Calendar Grey July 28, 2022
Dist Ubuntu Esm H88
Numerous Linux kernel vulnerabilities impacting Ubuntu 20.04 and 18.04 have been resolved with crucial patches and enhancements.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-bluefield: Linux kernel for NVIDIA BlueField platforms

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

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

Details:

It was discovered that the implementation of the 6pack and mkiss protocols

in the Linux kernel did not handle detach events properly in some

situations, leading to a use-after-free vulnerability. A local attacker

could possibly use this to cause a denial of service (system crash).

(CVE-2022-1195)

Duoming Zhou discovered that the AX.25 amateur radio protocol

implementation in the Linux kernel did not handle detach events properly in

some situations. A local attacker could possibly use this to cause a denial

of service (system crash) or execute arbitrary code. (CVE-2022-1199)

Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol

implementation in the Linux kernel during ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service software update local attack ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1042-bluefield  5.4.0-1042.47
  linux-image-bluefield           5.4.0.1042.41

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1078-gke      5.4.0-1078.84~18.04.1
  linux-image-5.4.0-1084-gcp      5.4.0-1084.92~18.04.1
  linux-image-gcp                 5.4.0.1084.63
  linux-image-gke-5.4             5.4.0.1078.84~18.04.40

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.

References

https://ubuntu.com/security/notices/USN-5539-1

CVE-2022-1195, CVE-2022-1199, CVE-2022-1204, CVE-2022-1205,

CVE-2022-1789, CVE-2022-28388, CVE-2022-33981

Severity
important
Lowest
Low
Medium
High
Critical

July 28, 2022

Topics%20covered

Topics Covered

security advisory denial of service software update local attack ubuntu system crash linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1042.47
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1084.92~18.04.1
https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1078.84~18.04.1

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