USN-5493-1: Linux kernel vulnerability

Published Jun 27, 2022
·
Updated

It was discovered that the 8 Devices USB2CAN interface implementation in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service (system crash).

Affected Software

64 affected componentsFixes available
All of the following
ubuntu/linux-image-5.13.0-52-generic-64k<5.13.0-52.59
5.13.0-52.59
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-virtual<5.13.0.52.58
5.13.0.52.58
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-generic-64k<5.13.0.52.58
5.13.0.52.58
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-generic<5.13.0.52.58
5.13.0.52.58
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-5.13.0-52-lowlatency<5.13.0-52.59
5.13.0-52.59
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-5.13.0-52-generic-lpae<5.13.0-52.59
5.13.0-52.59
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-oem-20.04<5.13.0.52.58
5.13.0.52.58
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-5.13.0-52-generic<5.13.0-52.59
5.13.0-52.59
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-generic-lpae<5.13.0.52.58
5.13.0.52.58
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-lowlatency<5.13.0.52.58
5.13.0.52.58
Ubuntu Ubuntu=21.10
All of the following
ubuntu/linux-image-virtual<5.4.0.121.122
5.4.0.121.122
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic<5.4.0.121.122
5.4.0.121.122
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem<5.4.0.121.122
5.4.0.121.122
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem-osp1<5.4.0.121.122
5.4.0.121.122
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-121-generic<5.4.0-121.137
5.4.0-121.137
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-121-generic-lpae<5.4.0-121.137
5.4.0-121.137
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-121-lowlatency<5.4.0-121.137
5.4.0-121.137
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-lpae<5.4.0.121.122
5.4.0.121.122
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-lowlatency<5.4.0.121.122
5.4.0.121.122
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-4.15.0-188-generic-lpae<4.15.0-188.199
4.15.0-188.199
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-virtual<4.15.0.188.173
4.15.0.188.173
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic<4.15.0.188.173
4.15.0.188.173
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-4.15.0-188-lowlatency<4.15.0-188.199
4.15.0-188.199
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-4.15.0-188-generic<4.15.0-188.199
4.15.0-188.199
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-lpae<4.15.0.188.173
4.15.0.188.173
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-lowlatency<4.15.0.188.173
4.15.0.188.173
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-4.15.0-188-lowlatency<Ubuntu Pro
Ubuntu Pro
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-lowlatency-hwe-16.04<Ubuntu Pro
Ubuntu Pro
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-4.15.0-188-generic<Ubuntu Pro
Ubuntu Pro
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-virtual-hwe-16.04<Ubuntu Pro
Ubuntu Pro
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-oem<Ubuntu Pro
Ubuntu Pro
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-generic-hwe-16.04<Ubuntu Pro
Ubuntu Pro
Ubuntu Ubuntu=16.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.13.0-52-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.13.0-52.59
  2. Upgrade

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

    Fixed in 5.13.0.52.58
  3. Upgrade

    Upgrade ubuntu/linux-image-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.13.0.52.58
  4. Upgrade

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

    Fixed in 5.13.0.52.58
  5. Upgrade

    Upgrade ubuntu/linux-image-5.13.0-52-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.13.0-52.59
  6. Upgrade

    Upgrade ubuntu/linux-image-5.13.0-52-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.13.0-52.59
  7. Upgrade

    Upgrade ubuntu/linux-image-oem-20.04 to a version that resolves this vulnerability.

    Fixed in 5.13.0.52.58
  8. Upgrade

    Upgrade ubuntu/linux-image-5.13.0-52-generic to a version that resolves this vulnerability.

    Fixed in 5.13.0-52.59
  9. Upgrade

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

    Fixed in 5.13.0.52.58
  10. Upgrade

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

    Fixed in 5.13.0.52.58
  11. Upgrade

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

    Fixed in 5.4.0.121.122
  12. Upgrade

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

    Fixed in 5.4.0.121.122
  13. Upgrade

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

    Fixed in 5.4.0.121.122
  14. Upgrade

    Upgrade ubuntu/linux-image-oem-osp1 to a version that resolves this vulnerability.

    Fixed in 5.4.0.121.122
  15. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-121-generic to a version that resolves this vulnerability.

    Fixed in 5.4.0-121.137
  16. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-121-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.4.0-121.137
  17. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-121-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.4.0-121.137
  18. Upgrade

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

    Fixed in 5.4.0.121.122
  19. Upgrade

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

    Fixed in 5.4.0.121.122
  20. Upgrade

    Upgrade ubuntu/linux-image-4.15.0-188-generic-lpae to a version that resolves this vulnerability.

    Fixed in 4.15.0-188.199
  21. Upgrade

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

    Fixed in 4.15.0.188.173
  22. Upgrade

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

    Fixed in 4.15.0.188.173
  23. Upgrade

    Upgrade ubuntu/linux-image-4.15.0-188-lowlatency to a version that resolves this vulnerability.

    Fixed in 4.15.0-188.199
  24. Upgrade

    Upgrade ubuntu/linux-image-4.15.0-188-generic to a version that resolves this vulnerability.

    Fixed in 4.15.0-188.199
  25. Upgrade

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

    Fixed in 4.15.0.188.173
  26. Upgrade

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

    Fixed in 4.15.0.188.173
  27. Upgrade

    Upgrade ubuntu/linux-image-4.15.0-188-lowlatency to a version that resolves this vulnerability.

    Fixed in Ubuntu Pro
  28. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-hwe-16.04 to a version that resolves this vulnerability.

    Fixed in Ubuntu Pro
  29. Upgrade

    Upgrade ubuntu/linux-image-4.15.0-188-generic to a version that resolves this vulnerability.

    Fixed in Ubuntu Pro
  30. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-16.04 to a version that resolves this vulnerability.

    Fixed in Ubuntu Pro
  31. Upgrade

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

    Fixed in Ubuntu Pro
  32. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-16.04 to a version that resolves this vulnerability.

    Fixed in Ubuntu Pro

Event History

Jun 27, 2022
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 severity of USN-5493-1?

The severity of USN-5493-1 is considered medium due to its potential to cause a denial of service.

2

How do I fix USN-5493-1?

To fix USN-5493-1, you should update the affected packages to at least version 5.13.0-52.59 or the recommended versions for your Ubuntu release.

3

Who is affected by USN-5493-1?

USN-5493-1 affects local users of Ubuntu versions 21.10 and 20.04 that utilize the specific USB2CAN interface in the Linux kernel.

4

What is the nature of the vulnerability in USN-5493-1?

The vulnerability in USN-5493-1 involves a double-free condition that can lead to a system crash when specific error conditions are not handled properly.

5

Is there a workaround for USN-5493-1 until I can apply the fix?

There are no known workarounds for USN-5493-1; it is advised to apply the recommended updates as soon as possible.

Company

Resources

Contact

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