USN-5046-1: Linux kernel vulnerabilities

Published Aug 18, 2021
·
Updated

It was discovered that the bluetooth subsystem in the Linux kernel did not properly perform access control. An authenticated attacker could possibly use this to expose sensitive information. (CVE-2020-26558, CVE-2021-0129) Michael Brown discovered that the Xen netback driver in the Linux kernel did not properly handle malformed packets from a network PV frontend, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-28691) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device initialization failure, leading to a double-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3564) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle HCI device detach events, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-3573) It was discovered that the NFC implementation in the Linux kernel did not properly handle failed connect events leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service. (CVE-2021-3587)

Affected Software

69 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-5.11.0-1016-raspi-nolpae<5.11.0-1016.17
5.11.0-1016.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-1013-azure<5.11.0-1013.14
5.11.0-1013.14
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-31-generic<5.11.0-31.33
5.11.0-31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-virtual<5.11.0.31.33
5.11.0.31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-generic-64k<5.11.0.31.33
5.11.0.31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-generic<5.11.0.31.33
5.11.0.31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-31-generic-lpae<5.11.0-31.33
5.11.0-31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-aws<5.11.0.1016.17
5.11.0.1016.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-1016-oracle<5.11.0-1016.17
5.11.0-1016.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-31-generic-64k<5.11.0-31.33
5.11.0-31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-1014-kvm<5.11.0-1014.15
5.11.0-1014.15
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-1016-aws<5.11.0-1016.17
5.11.0-1016.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-azure<5.11.0.1013.14
5.11.0.1013.14
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-raspi-nolpae<5.11.0.1016.14
5.11.0.1016.14
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-oem-20.04<5.11.0.31.33
5.11.0.31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-31-lowlatency<5.11.0-31.33
5.11.0-31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-gke<5.11.0.1017.17
5.11.0.1017.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-1017-gcp<5.11.0-1017.19
5.11.0-1017.19
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-1016-raspi<5.11.0-1016.17
5.11.0-1016.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-gcp<5.11.0.1017.17
5.11.0.1017.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-oracle<5.11.0.1016.17
5.11.0.1016.17
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-raspi<5.11.0.1016.14
5.11.0.1016.14
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-kvm<5.11.0.1014.15
5.11.0.1014.15
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-generic-lpae<5.11.0.31.33
5.11.0.31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-lowlatency<5.11.0.31.33
5.11.0.31.33
Ubuntu Ubuntu=21.04
All of the following
ubuntu/linux-image-5.11.0-27-lowlatency<5.11.0-27.29~20.04.1
5.11.0-27.29~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-hwe-20.04<5.11.0.27.29~20.04.11
5.11.0.27.29~20.04.11
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-20.04<5.11.0.27.29~20.04.11
5.11.0.27.29~20.04.11
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.11.0-27-generic<5.11.0-27.29~20.04.1
5.11.0-27.29~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-virtual-hwe-20.04<5.11.0.27.29~20.04.11
5.11.0.27.29~20.04.11
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-64k-hwe-20.04<5.11.0.27.29~20.04.11
5.11.0.27.29~20.04.11
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.11.0-27-generic-64k<5.11.0-27.29~20.04.1
5.11.0-27.29~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.11.0-27-generic-lpae<5.11.0-27.29~20.04.1
5.11.0-27.29~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-lowlatency-hwe-20.04<5.11.0.27.29~20.04.11
5.11.0.27.29~20.04.11
Ubuntu Ubuntu=20.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1016-raspi-nolpae to a version that resolves this vulnerability.

    Fixed in 5.11.0-1016.17
  2. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1013-azure to a version that resolves this vulnerability.

    Fixed in 5.11.0-1013.14
  3. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-31-generic to a version that resolves this vulnerability.

    Fixed in 5.11.0-31.33
  4. Upgrade

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

    Fixed in 5.11.0.31.33
  5. Upgrade

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

    Fixed in 5.11.0.31.33
  6. Upgrade

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

    Fixed in 5.11.0.31.33
  7. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-31-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.11.0-31.33
  8. Upgrade

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

    Fixed in 5.11.0.1016.17
  9. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1016-oracle to a version that resolves this vulnerability.

    Fixed in 5.11.0-1016.17
  10. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-31-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.11.0-31.33
  11. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1014-kvm to a version that resolves this vulnerability.

    Fixed in 5.11.0-1014.15
  12. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1016-aws to a version that resolves this vulnerability.

    Fixed in 5.11.0-1016.17
  13. Upgrade

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

    Fixed in 5.11.0.1013.14
  14. Upgrade

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

    Fixed in 5.11.0.1016.14
  15. Upgrade

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

    Fixed in 5.11.0.31.33
  16. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-31-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.11.0-31.33
  17. Upgrade

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

    Fixed in 5.11.0.1017.17
  18. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1017-gcp to a version that resolves this vulnerability.

    Fixed in 5.11.0-1017.19
  19. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-1016-raspi to a version that resolves this vulnerability.

    Fixed in 5.11.0-1016.17
  20. Upgrade

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

    Fixed in 5.11.0.1017.17
  21. Upgrade

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

    Fixed in 5.11.0.1016.17
  22. Upgrade

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

    Fixed in 5.11.0.1016.14
  23. Upgrade

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

    Fixed in 5.11.0.1014.15
  24. Upgrade

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

    Fixed in 5.11.0.31.33
  25. Upgrade

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

    Fixed in 5.11.0.31.33
  26. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-27-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.11.0-27.29~20.04.1
  27. Upgrade

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

    Fixed in 5.11.0.27.29~20.04.11
  28. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.11.0.27.29~20.04.11
  29. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-27-generic to a version that resolves this vulnerability.

    Fixed in 5.11.0-27.29~20.04.1
  30. Upgrade

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

    Fixed in 5.11.0.27.29~20.04.11
  31. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.11.0.27.29~20.04.11
  32. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-27-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.11.0-27.29~20.04.1
  33. Upgrade

    Upgrade ubuntu/linux-image-5.11.0-27-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.11.0-27.29~20.04.1
  34. Upgrade

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

    Fixed in 5.11.0.27.29~20.04.11

Event History

Aug 18, 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 severity of USN-5046-1?

USN-5046-1 is considered a high-severity vulnerability that can lead to potential exposure of sensitive information.

2

How do I fix USN-5046-1?

To mitigate USN-5046-1, you should upgrade to the patched Linux kernel versions including 5.11.0-1016.17 and similar versions as specified in the advisory.

3

Which systems are affected by USN-5046-1?

USN-5046-1 affects Ubuntu 21.04 systems running various Linux kernel packages listed in the advisory.

4

What are the affected components in USN-5046-1?

The vulnerability impacts the Bluetooth subsystem of the Linux kernel, particularly concerning access control.

5

Can USN-5046-1 be exploited remotely?

Yes, an authenticated attacker could potentially exploit USN-5046-1 to access sensitive information, although it requires authentication.

Company

Resources

Contact

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