USN-8726-1: Linux kernel vulnerabilities

Published Sep 7, 2026
·
Updated

It was discovered that some Arm processors could complete a broadcast translation lookaside buffer (TLB) invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges. (CVE-2025-10263) 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

107 affected componentsFixes available
Linux Linux kernel
All of the following
ubuntu/linux-image-7.0.0-1006-gke<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1006-gke-64k<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1011-gcp<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1011-gcp-64k<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1012-aws<7.0.0-1012.12
7.0.0-1012.12
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1012-aws-64k<7.0.0-1012.12
7.0.0-1012.12
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-31-generic<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-31-generic-64k<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-31-realtime<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-31-realtime-64k<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws<7.0.0-1012.12
7.0.0-1012.12
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws-64k<7.0.0-1012.12
7.0.0-1012.12
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws-64k-7.0<7.0.0-1012.12
7.0.0-1012.12
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws-7.0<7.0.0-1012.12
7.0.0-1012.12
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp-64k<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp-64k-7.0<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp-7.0<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-64k<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-64k-7.0<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-64k-hwe-26.04<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-7.0<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-hwe-26.04<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gke<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gke-64k<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gke-64k-7.0<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gke-64k-hwe-26.04<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gke-7.0<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gke-hwe-26.04<7.0.0-1006.7
7.0.0-1006.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-64k<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-64k-7.0<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-64k-hwe-26.04<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-7.0<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-hwe-26.04<7.0.0-31.31.1
7.0.0-31.31.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-virtual<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-virtual-7.0<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-virtual-hwe-26.04<7.0.0-31.31
7.0.0-31.31
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1012-aws<7.0.0-1012.12~24.04.1
7.0.0-1012.12~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-7.0.0-1012-aws-64k<7.0.0-1012.12~24.04.1
7.0.0-1012.12~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-7.0.0-31-generic<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-7.0.0-31-generic-64k<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-aws<7.0.0-1012.12~24.04.1
7.0.0-1012.12~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-aws-64k<7.0.0-1012.12~24.04.1
7.0.0-1012.12~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-aws-64k-7.0<7.0.0-1012.12~24.04.1
7.0.0-1012.12~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-aws-7.0<7.0.0-1012.12~24.04.1
7.0.0-1012.12~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-64k-7.0<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-64k-hwe-24.04<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-7.0<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-generic-hwe-24.04<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-virtual-7.0<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04
All of the following
ubuntu/linux-image-virtual-hwe-24.04<7.0.0-31.31~24.04.1
7.0.0-31.31~24.04.1
Ubuntu Ubuntu=24.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1006-gke to a version that resolves this vulnerability.

    Fixed in 7.0.0-1006.7
  2. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1006-gke-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1006.7
  3. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1011-gcp to a version that resolves this vulnerability.

    Fixed in 7.0.0-1011.11
  4. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1011-gcp-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1011.11
  5. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1012-aws to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12
  6. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1012-aws-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12
  7. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-31-generic to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  8. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-31-generic-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  9. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-31-realtime to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31.1
  10. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-31-realtime-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31.1
  11. Upgrade

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

    Fixed in 7.0.0-1012.12
  12. Upgrade

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

    Fixed in 7.0.0-1012.12
  13. Upgrade

    Upgrade ubuntu/linux-image-aws-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12
  14. Upgrade

    Upgrade ubuntu/linux-image-aws-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12
  15. Upgrade

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

    Fixed in 7.0.0-1011.11
  16. Upgrade

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

    Fixed in 7.0.0-1011.11
  17. Upgrade

    Upgrade ubuntu/linux-image-gcp-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1011.11
  18. Upgrade

    Upgrade ubuntu/linux-image-gcp-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1011.11
  19. Upgrade

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

    Fixed in 7.0.0-31.31
  20. Upgrade

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

    Fixed in 7.0.0-31.31
  21. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  22. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  23. Upgrade

    Upgrade ubuntu/linux-image-generic-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  24. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  25. Upgrade

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

    Fixed in 7.0.0-1006.7
  26. Upgrade

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

    Fixed in 7.0.0-1006.7
  27. Upgrade

    Upgrade ubuntu/linux-image-gke-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1006.7
  28. Upgrade

    Upgrade ubuntu/linux-image-gke-64k-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1006.7
  29. Upgrade

    Upgrade ubuntu/linux-image-gke-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1006.7
  30. Upgrade

    Upgrade ubuntu/linux-image-gke-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1006.7
  31. Upgrade

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

    Fixed in 7.0.0-31.31.1
  32. Upgrade

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

    Fixed in 7.0.0-31.31.1
  33. Upgrade

    Upgrade ubuntu/linux-image-realtime-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31.1
  34. Upgrade

    Upgrade ubuntu/linux-image-realtime-64k-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31.1
  35. Upgrade

    Upgrade ubuntu/linux-image-realtime-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31.1
  36. Upgrade

    Upgrade ubuntu/linux-image-realtime-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31.1
  37. Upgrade

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

    Fixed in 7.0.0-31.31
  38. Upgrade

    Upgrade ubuntu/linux-image-virtual-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  39. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31
  40. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1012-aws to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12~24.04.1
  41. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1012-aws-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12~24.04.1
  42. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-31-generic to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31~24.04.1
  43. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-31-generic-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31~24.04.1
  44. Upgrade

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

    Fixed in 7.0.0-1012.12~24.04.1
  45. Upgrade

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

    Fixed in 7.0.0-1012.12~24.04.1
  46. Upgrade

    Upgrade ubuntu/linux-image-aws-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12~24.04.1
  47. Upgrade

    Upgrade ubuntu/linux-image-aws-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1012.12~24.04.1
  48. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31~24.04.1
  49. Upgrade

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

    Fixed in 7.0.0-31.31~24.04.1
  50. Upgrade

    Upgrade ubuntu/linux-image-generic-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31~24.04.1
  51. Upgrade

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

    Fixed in 7.0.0-31.31~24.04.1
  52. Upgrade

    Upgrade ubuntu/linux-image-virtual-7.0 to a version that resolves this vulnerability.

    Fixed in 7.0.0-31.31~24.04.1
  53. Upgrade

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

    Fixed in 7.0.0-31.31~24.04.1

Event History

Sep 7, 2026
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Frequently Asked Questions

1

Is the disclosed Arm-specific issue remotely exploitable?

The advisory describes this issue as exploitable by a local attacker. It affects some Arm processors and could allow writes after permissions have been revoked, potentially bypassing memory protections or escalating privileges.

2

Which Ubuntu kernel package variants are included in this update?

The update covers linux-image-7.0.0-1012-aws, linux-image-7.0.0-1012-aws-64k, linux-image-7.0.0-31-generic, linux-image-7.0.0-31-generic-64k, linux-image-aws, linux-image-aws-64k, and linux-image-aws-64k-7.0.

3

Does the advisory provide temporary mitigations or configuration workarounds?

No temporary mitigation, configuration workaround, or detection method is provided in the advisory. Applying the supplied kernel update is the remediation identified by the notice.

Company

Resources

Contact

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