USN-6921-1: Linux kernel vulnerabilities

Published Jul 29, 2024
·
Updated

Benedict Schlüter, Supraja Sridhara, Andrin Bertschi, and Shweta Shinde discovered that an untrusted hypervisor could inject malicious #VC interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw is known as WeSee. A local attacker in control of the hypervisor could use this to expose sensitive information or possibly execute arbitrary code in the trusted execution environment. (CVE-2024-25742) Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

Affected Software

59 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-6.8.0-1007-gke<6.8.0-1007.10
6.8.0-1007.10
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1008-raspi<6.8.0-1008.8
6.8.0-1008.8
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1009-ibm<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1009-oem<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1010-nvidia<6.8.0-1010.10
6.8.0-1010.10
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1010-nvidia-64k<6.8.0-1010.10
6.8.0-1010.10
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1011-gcp<6.8.0-1011.12
6.8.0-1011.12
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-1012-aws<6.8.0-1012.13
6.8.0-1012.13
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-39-generic<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.8.0-39-generic-64k<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-aws<6.8.0-1012.13
6.8.0-1012.13
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-gcp<6.8.0-1011.12
6.8.0-1011.12
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-64k<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-64k-hwe-24.04<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-hwe-24.04<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-lpae<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-gke<6.8.0-1007.10
6.8.0-1007.10
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-ibm<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-ibm-classic<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-ibm-lts-24.04<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-kvm<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-nvidia<6.8.0-1010.10
6.8.0-1010.10
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-nvidia-64k<6.8.0-1010.10
6.8.0-1010.10
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-oem-24.04<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-oem-24.04a<6.8.0-1009.9
6.8.0-1009.9
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-raspi<6.8.0-1008.8
6.8.0-1008.8
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-virtual<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-virtual-hwe-24.04<6.8.0-39.39
6.8.0-39.39
Ubuntu Ubuntu=24.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1007-gke to a version that resolves this vulnerability.

    Fixed in 6.8.0-1007.10
  2. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1008-raspi to a version that resolves this vulnerability.

    Fixed in 6.8.0-1008.8
  3. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1009-ibm to a version that resolves this vulnerability.

    Fixed in 6.8.0-1009.9
  4. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1009-oem to a version that resolves this vulnerability.

    Fixed in 6.8.0-1009.9
  5. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1010-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1010.10
  6. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1010-nvidia-64k to a version that resolves this vulnerability.

    Fixed in 6.8.0-1010.10
  7. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1011-gcp to a version that resolves this vulnerability.

    Fixed in 6.8.0-1011.12
  8. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-1012-aws to a version that resolves this vulnerability.

    Fixed in 6.8.0-1012.13
  9. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-39-generic to a version that resolves this vulnerability.

    Fixed in 6.8.0-39.39
  10. Upgrade

    Upgrade ubuntu/linux-image-6.8.0-39-generic-64k to a version that resolves this vulnerability.

    Fixed in 6.8.0-39.39
  11. Upgrade

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

    Fixed in 6.8.0-1012.13
  12. Upgrade

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

    Fixed in 6.8.0-1011.12
  13. Upgrade

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

    Fixed in 6.8.0-39.39
  14. Upgrade

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

    Fixed in 6.8.0-39.39
  15. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-hwe-24.04 to a version that resolves this vulnerability.

    Fixed in 6.8.0-39.39
  16. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-24.04 to a version that resolves this vulnerability.

    Fixed in 6.8.0-39.39
  17. Upgrade

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

    Fixed in 6.8.0-39.39
  18. Upgrade

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

    Fixed in 6.8.0-1007.10
  19. Upgrade

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

    Fixed in 6.8.0-1009.9
  20. Upgrade

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

    Fixed in 6.8.0-1009.9
  21. Upgrade

    Upgrade ubuntu/linux-image-ibm-lts-24.04 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1009.9
  22. Upgrade

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

    Fixed in 6.8.0-39.39
  23. Upgrade

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

    Fixed in 6.8.0-1010.10
  24. Upgrade

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

    Fixed in 6.8.0-1010.10
  25. Upgrade

    Upgrade ubuntu/linux-image-oem-24.04 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1009.9
  26. Upgrade

    Upgrade ubuntu/linux-image-oem-24.04a to a version that resolves this vulnerability.

    Fixed in 6.8.0-1009.9
  27. Upgrade

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

    Fixed in 6.8.0-1008.8
  28. Upgrade

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

    Fixed in 6.8.0-39.39
  29. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-24.04 to a version that resolves this vulnerability.

    Fixed in 6.8.0-39.39
  30. Upgrade

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

    Patch USN-6921-1

Event History

Jul 29, 2024
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-6921-1?

The severity of USN-6921-1 is classified as high due to the potential for local attackers to exploit the vulnerability.

2

How do I fix USN-6921-1?

To fix USN-6921-1, upgrade to the recommended package version by obtaining the latest linux-image for your Ubuntu 24.04 installation.

3

What does the vulnerability USN-6921-1 affect?

USN-6921-1 affects certain versions of the linux-image package on Ubuntu 24.04 that use AMD SEV-SNP technology.

4

Who discovered the issue reported in USN-6921-1?

The issue reported in USN-6921-1 was discovered by security researchers Benedict Schlüter, Supraja Sridhara, Andrin Bertschi, and Shweta Shinde.

5

Is USN-6921-1 related to specific hardware?

Yes, USN-6921-1 is specifically related to security vulnerabilities in the AMD SEV-SNP hypervisor environment.

Company

Resources

Contact

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