USN-4253-1: Linux kernel vulnerability

Published Jan 28, 2020
·
Updated

It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors. A local attacker could use this to expose sensitive information.

Affected Software

21 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-5.3.0-1010-aws<5.3.0-1010.11
5.3.0-1010.11
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-29-generic<5.3.0-29.31
5.3.0-29.31
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-generic<5.3.0.29.33
5.3.0.29.33
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-29-snapdragon<5.3.0-29.31
5.3.0-29.31
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-29-lowlatency<5.3.0-29.31
5.3.0-29.31
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-virtual<5.3.0.29.33
5.3.0.29.33
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-generic-lpae<5.3.0.29.33
5.3.0.29.33
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-aws<5.3.0.1010.12
5.3.0.1010.12
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-lowlatency<5.3.0.29.33
5.3.0.29.33
Ubuntu Ubuntu=19.10
All of the following
ubuntu/linux-image-5.3.0-29-generic-lpae<5.3.0-29.31
5.3.0-29.31
Ubuntu Ubuntu=19.10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1010-aws to a version that resolves this vulnerability.

    Fixed in 5.3.0-1010.11
  2. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-29-generic to a version that resolves this vulnerability.

    Fixed in 5.3.0-29.31
  3. Upgrade

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

    Fixed in 5.3.0.29.33
  4. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-29-snapdragon to a version that resolves this vulnerability.

    Fixed in 5.3.0-29.31
  5. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-29-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.3.0-29.31
  6. Upgrade

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

    Fixed in 5.3.0.29.33
  7. Upgrade

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

    Fixed in 5.3.0.29.33
  8. Upgrade

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

    Fixed in 5.3.0.1010.12
  9. Upgrade

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

    Fixed in 5.3.0.29.33
  10. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-29-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.3.0-29.31

Event History

Jan 28, 2020
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 title of the vulnerability?

The title of the vulnerability is USN-4253-1: Linux kernel vulnerability.

2

What was the issue with the Linux kernel?

The Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors.

3

How can this vulnerability be exploited?

A local attacker could use this vulnerability to expose sensitive information.

4

Which version of Ubuntu is affected?

The vulnerability affects Ubuntu 19.10.

5

What is the remedy for this vulnerability?

To fix this vulnerability, update to Linux kernel version 5.3.0-1010.11 or higher.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203