A Linux kernel (OEM) security update has been released for Ubuntu Linux 20.04 LTS.

USN-4753-1: Linux kernel (OEM) vulnerability

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Ubuntu Security Notice USN-4753-1
February 25, 2021

linux-oem-5.10 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

The system could allow unintended access to data in some environments.

Software Description:
- linux-oem-5.10: Linux kernel for OEM systems

Details:

It was discovered that the LIO SCSI target implementation in the Linux
kernel performed insufficient identifier checking in certain XCOPY
requests. An attacker with access to at least one LUN in a multiple
backstore environment could use this to expose sensitive information or
modify data. (CVE-2020-28374)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.10.0-1014-oem 5.10.0-1014.15
linux-image-oem-20.04b 5.10.0.1014.15

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://usn.ubuntu.com/4753-1
CVE-2020-28374, CVE-2021-3178

Package Information:
  https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1014.15