USN-5016-1: Linux kernel vulnerabilities

Published Jul 20, 2021
·
Updated

It was discovered that the virtual file system implementation in the Linux kernel contained an unsigned to signed integer conversion error. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-33909) Or Cohen and Nadav Markus discovered a use-after-free vulnerability in the nfc implementation in the Linux kernel. A privileged local attacker could use this issue to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-23134) It was discovered that a race condition in the kernel Bluetooth subsystem could lead to use-after-free of slab objects. An attacker could use this issue to possibly execute arbitrary code. (CVE-2021-32399) It was discovered that a use-after-free existed in the Bluetooth HCI driver of the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-33034) It was discovered that an out-of-bounds (OOB) memory access flaw existed in the f2fs module of the Linux kernel. A local attacker could use this issue to cause a denial of service (system crash). (CVE-2021-3506)

Affected Software

85 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-generic<5.8.0.63.69
5.8.0.63.69
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-virtual<5.8.0.63.69
5.8.0.63.69
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic-64k<5.8.0.63.69
5.8.0.63.69
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1033-kvm<5.8.0-1033.36
5.8.0-1033.36
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-aws<5.8.0.1041.43
5.8.0.1041.43
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-63-generic-64k<5.8.0-63.71
5.8.0-63.71
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1032-raspi<5.8.0-1032.35
5.8.0-1032.35
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-63-generic-lpae<5.8.0-63.71
5.8.0-63.71
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1032-raspi-nolpae<5.8.0-1032.35
5.8.0-1032.35
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-azure<5.8.0.1039.40
5.8.0.1039.40
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-raspi-nolpae<5.8.0.1032.34
5.8.0.1032.34
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-63-lowlatency<5.8.0-63.71
5.8.0-63.71
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-oem-20.04<5.8.0.63.69
5.8.0.63.69
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-gke<5.8.0.1038.38
5.8.0.1038.38
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-kvm<5.8.0.1033.36
5.8.0.1033.36
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1037-oracle<5.8.0-1037.38
5.8.0-1037.38
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1039-azure<5.8.0-1039.42
5.8.0-1039.42
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-63-generic<5.8.0-63.71
5.8.0-63.71
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-gcp<5.8.0.1038.38
5.8.0.1038.38
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-oracle<5.8.0.1037.36
5.8.0.1037.36
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1038-gcp<5.8.0-1038.40
5.8.0-1038.40
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-raspi<5.8.0.1032.34
5.8.0.1032.34
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1041-aws<5.8.0-1041.43
5.8.0-1041.43
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic-lpae<5.8.0.63.69
5.8.0.63.69
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-lowlatency<5.8.0.63.69
5.8.0.63.69
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1038-gcp<5.8.0-1038.40~20.04.1
5.8.0-1038.40~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-aws<5.8.0.1041.43~20.04.13
5.8.0.1041.43~20.04.13
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-63-generic-64k<5.8.0-63.71~20.04.1
5.8.0-63.71~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-lowlatency-hwe-20.04<5.8.0.63.71~20.04.45
5.8.0.63.71~20.04.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-63-lowlatency<5.8.0-63.71~20.04.1
5.8.0-63.71~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-hwe-20.04<5.8.0.63.71~20.04.45
5.8.0.63.71~20.04.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-azure<5.8.0.1039.42~20.04.11
5.8.0.1039.42~20.04.11
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-1039-azure<5.8.0-1039.42~20.04.1
5.8.0-1039.42~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-1037-oracle<5.8.0-1037.38~20.04.1
5.8.0-1037.38~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-virtual-hwe-20.04<5.8.0.63.71~20.04.45
5.8.0.63.71~20.04.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-63-generic<5.8.0-63.71~20.04.1
5.8.0-63.71~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-gcp<5.8.0.1038.40~20.04.13
5.8.0.1038.40~20.04.13
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-63-generic-lpae<5.8.0-63.71~20.04.1
5.8.0-63.71~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-64k-hwe-20.04<5.8.0.63.71~20.04.45
5.8.0.63.71~20.04.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oracle<5.8.0.1037.38~20.04.13
5.8.0.1037.38~20.04.13
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-20.04<5.8.0.63.71~20.04.45
5.8.0.63.71~20.04.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-1041-aws<5.8.0-1041.43~20.04.1
5.8.0-1041.43~20.04.1
Ubuntu Ubuntu=20.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.8.0.63.69
  2. Upgrade

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

    Fixed in 5.8.0.63.69
  3. Upgrade

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

    Fixed in 5.8.0.63.69
  4. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1033-kvm to a version that resolves this vulnerability.

    Fixed in 5.8.0-1033.36
  5. Upgrade

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

    Fixed in 5.8.0.1041.43
  6. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71
  7. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1032-raspi to a version that resolves this vulnerability.

    Fixed in 5.8.0-1032.35
  8. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71
  9. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1032-raspi-nolpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-1032.35
  10. Upgrade

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

    Fixed in 5.8.0.1039.40
  11. Upgrade

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

    Fixed in 5.8.0.1032.34
  12. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71
  13. Upgrade

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

    Fixed in 5.8.0.63.69
  14. Upgrade

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

    Fixed in 5.8.0.1038.38
  15. Upgrade

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

    Fixed in 5.8.0.1033.36
  16. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1037-oracle to a version that resolves this vulnerability.

    Fixed in 5.8.0-1037.38
  17. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1039-azure to a version that resolves this vulnerability.

    Fixed in 5.8.0-1039.42
  18. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71
  19. Upgrade

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

    Fixed in 5.8.0.1038.38
  20. Upgrade

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

    Fixed in 5.8.0.1037.36
  21. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1038-gcp to a version that resolves this vulnerability.

    Fixed in 5.8.0-1038.40
  22. Upgrade

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

    Fixed in 5.8.0.1032.34
  23. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1041-aws to a version that resolves this vulnerability.

    Fixed in 5.8.0-1041.43
  24. Upgrade

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

    Fixed in 5.8.0.63.69
  25. Upgrade

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

    Fixed in 5.8.0.63.69
  26. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1038-gcp to a version that resolves this vulnerability.

    Fixed in 5.8.0-1038.40~20.04.1
  27. Upgrade

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

    Fixed in 5.8.0.1041.43~20.04.13
  28. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71~20.04.1
  29. Upgrade

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

    Fixed in 5.8.0.63.71~20.04.45
  30. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71~20.04.1
  31. Upgrade

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

    Fixed in 5.8.0.63.71~20.04.45
  32. Upgrade

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

    Fixed in 5.8.0.1039.42~20.04.11
  33. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1039-azure to a version that resolves this vulnerability.

    Fixed in 5.8.0-1039.42~20.04.1
  34. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1037-oracle to a version that resolves this vulnerability.

    Fixed in 5.8.0-1037.38~20.04.1
  35. Upgrade

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

    Fixed in 5.8.0.63.71~20.04.45
  36. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71~20.04.1
  37. Upgrade

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

    Fixed in 5.8.0.1038.40~20.04.13
  38. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-63-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-63.71~20.04.1
  39. Upgrade

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

    Fixed in 5.8.0.63.71~20.04.45
  40. Upgrade

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

    Fixed in 5.8.0.1037.38~20.04.13
  41. Upgrade

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

    Fixed in 5.8.0.63.71~20.04.45
  42. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1041-aws to a version that resolves this vulnerability.

    Fixed in 5.8.0-1041.43~20.04.1
  43. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch USN-5016-1

Event History

Jul 20, 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-5016-1?

USN-5016-1 is rated as a critical vulnerability due to its potential for remote code execution or denial of service.

2

How do I fix USN-5016-1?

To fix USN-5016-1, update your Linux kernel package to version 5.8.0.63.69 or later.

3

Which Ubuntu versions are affected by USN-5016-1?

USN-5016-1 affects Ubuntu 20.10 and its related Linux kernel packages.

4

What type of vulnerability is USN-5016-1?

USN-5016-1 is an integer conversion vulnerability that can lead to system crashes or arbitrary code execution.

5

Can USN-5016-1 be exploited remotely?

Yes, a local attacker can exploit USN-5016-1 to cause a denial of service or execute arbitrary code.

Company

Resources

Contact

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