USN-7879-1: Linux kernel vulnerabilities

Published Nov 21, 2025
·
Updated

It was discovered that improper initialization of CPU cache memory could allow a local attacker with hypervisor access to overwrite SEV-SNP guest memory resulting in loss of data integrity. (CVE-2024-36331) 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

78 affected componentsFixes available
All of the following
ubuntu/linux-image-6.14.0-1016-realtime<6.14.0-1016.16
6.14.0-1016.16
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-1017-aws<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-1017-aws-64k<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-1017-oracle<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-1017-oracle-64k<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-1020-gcp<6.14.0-1020.21
6.14.0-1020.21
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-1020-gcp-64k<6.14.0-1020.21
6.14.0-1020.21
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-36-generic<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-36-generic-64k<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-aws<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-aws-6.14<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-aws-64k<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-aws-64k-6.14<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-gcp<6.14.0-1020.21
6.14.0-1020.21
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-gcp-6.14<6.14.0-1020.21
6.14.0-1020.21
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-gcp-64k<6.14.0-1020.21
6.14.0-1020.21
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-gcp-64k-6.14<6.14.0-1020.21
6.14.0-1020.21
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-generic<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-generic-6.14<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-generic-64k<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-generic-64k-6.14<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-oem-24.04<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-oem-24.04a<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-oracle<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-oracle-6.14<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-oracle-64k<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-oracle-64k-6.14<6.14.0-1017.17
6.14.0-1017.17
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-realtime<6.14.0-1016.16
6.14.0-1016.16
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-realtime-6.14<6.14.0-1016.16
6.14.0-1016.16
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-virtual<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-virtual-6.14<6.14.0-36.36
6.14.0-36.36
Ubuntu Ubuntu=25.04
All of the following
ubuntu/linux-image-6.14.0-36-generic<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-6.14.0-36-generic-64k<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-6.14<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-64k-6.14<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-64k-hwe-24.04<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-hwe-24.04<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-virtual-6.14<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-virtual-hwe-24.04<6.14.0-36.36~24.04.1
6.14.0-36.36~24.04.1
Ubuntu Ubuntu=24.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1016-realtime to a version that resolves this vulnerability.

    Fixed in 6.14.0-1016.16
  2. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1017-aws to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  3. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1017-aws-64k to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  4. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1017-oracle to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  5. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1017-oracle-64k to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  6. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1020-gcp to a version that resolves this vulnerability.

    Fixed in 6.14.0-1020.21
  7. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-1020-gcp-64k to a version that resolves this vulnerability.

    Fixed in 6.14.0-1020.21
  8. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-36-generic to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36
  9. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-36-generic-64k to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36
  10. Upgrade

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

    Fixed in 6.14.0-1017.17
  11. Upgrade

    Upgrade ubuntu/linux-image-aws-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  12. Upgrade

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

    Fixed in 6.14.0-1017.17
  13. Upgrade

    Upgrade ubuntu/linux-image-aws-64k-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  14. Upgrade

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

    Fixed in 6.14.0-1020.21
  15. Upgrade

    Upgrade ubuntu/linux-image-gcp-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1020.21
  16. Upgrade

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

    Fixed in 6.14.0-1020.21
  17. Upgrade

    Upgrade ubuntu/linux-image-gcp-64k-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1020.21
  18. Upgrade

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

    Fixed in 6.14.0-36.36
  19. Upgrade

    Upgrade ubuntu/linux-image-generic-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36
  20. Upgrade

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

    Fixed in 6.14.0-36.36
  21. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36
  22. Upgrade

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

    Fixed in 6.14.0-36.36
  23. Upgrade

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

    Fixed in 6.14.0-36.36
  24. Upgrade

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

    Fixed in 6.14.0-1017.17
  25. Upgrade

    Upgrade ubuntu/linux-image-oracle-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  26. Upgrade

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

    Fixed in 6.14.0-1017.17
  27. Upgrade

    Upgrade ubuntu/linux-image-oracle-64k-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1017.17
  28. Upgrade

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

    Fixed in 6.14.0-1016.16
  29. Upgrade

    Upgrade ubuntu/linux-image-realtime-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1016.16
  30. Upgrade

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

    Fixed in 6.14.0-36.36
  31. Upgrade

    Upgrade ubuntu/linux-image-virtual-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36
  32. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-36-generic to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36~24.04.1
  33. Upgrade

    Upgrade ubuntu/linux-image-6.14.0-36-generic-64k to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36~24.04.1
  34. Upgrade

    Upgrade ubuntu/linux-image-generic-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36~24.04.1
  35. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36~24.04.1
  36. Upgrade

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

    Fixed in 6.14.0-36.36~24.04.1
  37. Upgrade

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

    Fixed in 6.14.0-36.36~24.04.1
  38. Upgrade

    Upgrade ubuntu/linux-image-virtual-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-36.36~24.04.1
  39. Upgrade

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

    Fixed in 6.14.0-36.36~24.04.1
  40. Upgrade

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

    Patch USN-7879-1

Event History

Nov 21, 2025
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Frequently Asked Questions

1

Who is directly exposed to the specifically described cache-memory flaw?

The described issue affects SEV-SNP guests where a local attacker has hypervisor access. Such an attacker could overwrite guest memory and compromise data integrity.

2

What access would an attacker need to exploit the described issue?

The attacker would need local access at the hypervisor level. The provided information does not describe exploitation by an unprivileged guest user or a remote attacker.

3

Which Ubuntu kernel packages are identified by this update?

The listed packages include linux-image-6.14.0-36-generic, linux-image-6.14.0-36-generic-64k, linux-image-generic-6.14, linux-image-generic-64k-6.14, linux-image-virtual-6.14, linux-image-6.14.0-1016-realtime, and linux-image-6.14.0-1017-aws.

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