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Ubuntu 20.04 LTS USN-5302-1: Moderate Kernel Security Issues

ubuntu
Calendar Grey February 22, 2022
Dist Ubuntu Esm H88
Tackling security vulnerabilities in Ubuntu 20.04 LTS that impact the Linux kernel through essential updates for kernel environments.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.14: Linux kernel for OEM systems

Details:

Yiqi Sun and Kevin Wang discovered that the cgroups implementation

in the Linux kernel did not properly restrict access to the cgroups

v1 release_agent feature. A local attacker could use this to gain

administrative privileges. (CVE-2022-0492)

Brendan Dolan-Gavitt discovered that the Marvell WiFi-Ex USB device

driver in the Linux kernel did not properly handle some error

conditions. A physically proximate attacker could use this to cause

a denial of service (system crash). (CVE-2021-43976)

Wenqing Liu discovered that the f2fs file system implementation in the

Linux kernel did not properly validate inode types while performing

garbage collection. An attacker could use this to construct a malicious

f2fs image that, when mounted and operated on, could cause a denial

of service (system crash). (CVE-2021-44879)

Samuel Page discovered that the Transp...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service software update ubuntu linux kernel administrative privileges modest

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.14.0-1024-oem     5.14.0-1024.26
  linux-image-oem-20.04           5.14.0.1024.22
  linux-image-oem-20.04b          5.14.0.1024.22
  linux-image-oem-20.04c          5.14.0.1024.22
  linux-image-oem-20.04d          5.14.0.1024.22

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-5302-1

CVE-2021-43976, CVE-2021-44879, CVE-2022-0435, CVE-2022-0492,

CVE-2022-24448, CVE-2022-24959

February 22, 2022

Topics%20covered

Topics Covered

security advisory denial of service software update ubuntu linux kernel administrative privileges modest

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1024.26

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