=========================================================================Ubuntu Security Notice USN-5267-3
February 17, 2022

linux-raspi, linux-raspi-5.4 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

USN-5267-1 fixed vulnerabilities in the Linux kernel. This
update provides the corresponding updates for the Linux kernel
for Raspberry Pi devices.

Original advisory details:

 It was discovered that the Bluetooth subsystem in the Linux kernel
 contained a use-after-free vulnerability. A local attacker could use this
 to cause a denial of service (system crash) or possibly execute arbitrary
 code. (CVE-2021-3640)

 Likang Luo discovered that a race condition existed in the Bluetooth
 subsystem of the Linux kernel, leading to a use-after-free vulnerability. A
 local attacker could use this to cause a denial of service (system crash)
 or possibly execute arbitrary code. (CVE-2021-3752)

 Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel
 did not properly perform bounds checking in some situations. A local
 attacker could use this to cause a denial of service (system crash) or
 possibly execute arbitrary code. (CVE-2021-42739)

Update instructions:

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1052-raspi    5.4.0-1052.58
  linux-image-raspi               5.4.0.1052.86
  linux-image-raspi2              5.4.0.1052.86

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1052-raspi    5.4.0-1052.58~18.04.1
  linux-image-raspi-hwe-18.04     5.4.0.1052.54

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-5267-3
  https://ubuntu.com/security/notices/USN-5267-1
  CVE-2021-3640, CVE-2021-3752, CVE-2021-42739

Package Information:
  https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1052.58
  https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1052.58~18.04.1

Ubuntu 5267-3: Linux kernel (Raspberry Pi) vulnerabilities

February 17, 2022
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1052-raspi 5.4.0-1052.58 linux-image-raspi 5.4.0.1052.86 linux-image-raspi2 5.4.0.1052.86 Ubuntu 18.04 LTS: linux-image-5.4.0-1052-raspi 5.4.0-1052.58~18.04.1 linux-image-raspi-hwe-18.04 5.4.0.1052.54 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-5267-3

https://ubuntu.com/security/notices/USN-5267-1

CVE-2021-3640, CVE-2021-3752, CVE-2021-42739

Severity
February 17, 2022

Package Information

https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1052.58 https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1052.58~18.04.1