Ubuntu 5485-2: Linux kernel (OEM) vulnerabilities | LinuxSecurity.com

Advisories

==========================================================================
Ubuntu Security Notice USN-5485-2
July 01, 2022

linux-oem-5.14 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were mitigated in the Linux kernel.

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

Details:

It was discovered that some Intel processors did not completely perform
cleanup actions on multi-core shared buffers. A local attacker could
possibly use this to expose sensitive information. (CVE-2022-21123)

It was discovered that some Intel processors did not completely perform
cleanup actions on microarchitectural fill buffers. A local attacker could
possibly use this to expose sensitive information. (CVE-2022-21125)

It was discovered that some Intel processors did not properly perform
cleanup during specific special register write operations. A local attacker
could possibly use this to expose sensitive information. (CVE-2022-21166)

Update instructions:

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

Ubuntu 20.04 LTS:
  linux-image-5.14.0-1044-oem     5.14.0-1044.49
  linux-image-oem-20.04           5.14.0.1044.40
  linux-image-oem-20.04b          5.14.0.1044.40
  linux-image-oem-20.04c          5.14.0.1044.40
  linux-image-oem-20.04d          5.14.0.1044.40

Please note that fully mitigating processor vulnerabilities requires
corresponding processor microcode/firmware updates.

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-5485-2
  https://ubuntu.com/security/notices/USN-5485-1
  CVE-2022-21123, CVE-2022-21125, CVE-2022-21166

Package Information:
  https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1044.49

Ubuntu 5485-2: Linux kernel (OEM) vulnerabilities

July 1, 2022

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: Several security issues were mitigated in the Linux kernel. Software Description: - linux-oem-5.14: Linux kernel for OEM systems Details: It was discovered that some Intel processors did not completely perform cleanup actions on multi-core shared buffers. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21123) It was discovered that some Intel processors did not completely perform cleanup actions on microarchitectural fill buffers. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21125) It was discovered that some Intel processors did not properly perform cleanup during specific special register write operations. A local attacker could possibly use this to expose sensitive information. (CVE-2022-21166)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.14.0-1044-oem 5.14.0-1044.49 linux-image-oem-20.04 5.14.0.1044.40 linux-image-oem-20.04b 5.14.0.1044.40 linux-image-oem-20.04c 5.14.0.1044.40 linux-image-oem-20.04d 5.14.0.1044.40 Please note that fully mitigating processor vulnerabilities requires corresponding processor microcode/firmware updates. 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-5485-2

https://ubuntu.com/security/notices/USN-5485-1

CVE-2022-21123, CVE-2022-21125, CVE-2022-21166

Severity
Ubuntu Security Notice USN-5485-2

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1044.49

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