A Linux kernel (Raspberry Pi) security update has been released for Ubuntu Linux 22.04 LTS.

USN-5390-2: Linux kernel (Raspberry Pi) vulnerabilities

=========================================================================
Ubuntu Security Notice USN-5390-2
May 03, 2022

linux-raspi vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

David Bouman discovered that the netfilter subsystem in the Linux kernel
did not properly validate passed user register indices. A local attacker
could use this to cause a denial of service or possibly execute arbitrary
code. (CVE-2022-1015)

David Bouman discovered that the netfilter subsystem in the Linux kernel
did not initialize memory in some situations. A local attacker could use
this to expose sensitive information (kernel memory). (CVE-2022-1016)

It was discovered that the ST21NFCA NFC driver in the Linux kernel did not
properly validate the size of certain data in EVT_TRANSACTION events. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2022-26490)

Update instructions:

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

Ubuntu 22.04 LTS:
linux-image-5.15.0-1006-raspi 5.15.0-1006.6
linux-image-5.15.0-1006-raspi-nolpae 5.15.0-1006.6
linux-image-raspi 5.15.0.1006.6
linux-image-raspi-nolpae 5.15.0.1006.6

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-5390-2
  https://ubuntu.com/security/notices/USN-5390-1
CVE-2022-1015, CVE-2022-1016, CVE-2022-26490

Package Information:
  https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1006.6