USN-5071-3: Linux kernel (Raspberry Pi) vulnerabilities

Published Sep 22, 2021
·
Updated

It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could start and control a VM could possibly use this to expose sensitive information or execute arbitrary code. (CVE-2021-22543) Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

Affected Software

11 affected componentsFixes available
Raspberry Pi Foundation Linux kernel
All of the following
ubuntu/linux-image-5.4.0-1043-raspi<5.4.0-1043.47
5.4.0-1043.47
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-raspi<5.4.0.1043.78
5.4.0.1043.78
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-raspi2<5.4.0.1043.78
5.4.0.1043.78
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1043-raspi<5.4.0-1043.47~18.04.1
5.4.0-1043.47~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-raspi-hwe-18.04<5.4.0.1043.46
5.4.0.1043.46
Ubuntu Ubuntu=18.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1043-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1043.47
  2. Upgrade

    Upgrade ubuntu/linux-image-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0.1043.78
  3. Upgrade

    Upgrade ubuntu/linux-image-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1043.78
  4. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1043-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1043.47~18.04.1
  5. Upgrade

    Upgrade ubuntu/linux-image-raspi-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1043.46

Event History

Sep 22, 2021
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the vulnerability ID for this Linux kernel vulnerability?

The vulnerability ID for this Linux kernel vulnerability is USN-5071-3.

2

What is the severity of the USN-5071-3 vulnerability?

The severity of the USN-5071-3 vulnerability is not mentioned in the provided information.

3

What is the affected software for the USN-5071-3 vulnerability?

The affected software for the USN-5071-3 vulnerability is Linux kernel (Raspberry Pi).

4

How can an attacker exploit the USN-5071-3 vulnerability?

An attacker who could start and control a VM could possibly exploit the USN-5071-3 vulnerability to expose sensitive information or execute arbitrary code.

5

How can I fix the USN-5071-3 vulnerability?

To fix the USN-5071-3 vulnerability, update the Linux kernel to version 5.4.0-1043.47 or later.

Company

Resources

Contact

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