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Ubuntu 20.04 LTS: 5297-1 Critical: Linux Kernel GKE Issues

ubuntu
Calendar Grey February 22, 2022
Dist Ubuntu Esm H88
Multiple vulnerabilities were identified in Ubuntu's Linux kernel, impacting the security framework and posing threats to data integrity.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

Szymon Heidrich discovered that the USB Gadget subsystem in the Linux

kernel did not properly restrict the size of control requests for certain

gadget types, leading to possible out of bounds reads or writes. A local

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2021-39685)

Jann Horn discovered a race condition in the Unix domain socket

implementation in the Linux kernel that could result in a read-after-free.

A local attacker could use this to cause a denial of service (system crash)

or possibly execute arbitrary code. (CVE-2021-4083)

Kirill Tkhai discovered that the XFS file system implementation in the

Linux kernel did not calculate size correctly when pre-allocating space in

some situations. A local attacker could use this to expose sensitive

information. (CV...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service code execution 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-5.4.0-1063-gke      5.4.0-1063.66
  linux-image-gke                 5.4.0.1063.73
  linux-image-gke-5.4             5.4.0.1063.73

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-5297-1

CVE-2021-39685, CVE-2021-4083, CVE-2021-4155, CVE-2021-4202,

CVE-2021-43975, CVE-2022-0330, CVE-2022-22942

Severity
critical
Lowest
Low
Medium
High
Critical

February 22, 2022

Topics%20covered

Topics Covered

security advisory denial of service code execution ubuntu system crash linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1063.66

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