USN-8370-1: Linux kernel vulnerabilities

Published Jun 2, 2026
·
Updated

It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000)

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503, CVE-2026-46300)

Qualys discovered that a race condition existed in the ptrace subsystem of the Linux kernel when privileged processes are exiting. An unprivileged local attacker could use this issue to expose sensitive information. (CVE-2026-46333)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a memory leak when handling AppArmor notifications. A local attacker could use this to cause resource exhaustion. (CVE-2026-47326)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel oops. (CVE-2026-47327)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an invalid free when handling AppArmor notifications. A local attacker could use this to corrupt kernel memory. (CVE-2026-47328)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained insufficient validation of AppArmor notification responses. A local attacker could use this to allow crafted responses to be processed. (CVE-2026-47329)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 used an uninitialized variable when handling AppArmor notifications. A local attacker could use this to cause incorrect caching of data. (CVE-2026-47330)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause information disclosure of kernel memory. (CVE-2026-47332)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause kernel memory corruption and, theoretically, influence processing of AppArmor policies. (CVE-2026-47333)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained incorrect holding of locks when handling AppArmor notifications. A local attacker could use this to cause a kernel panic or deadlock. (CVE-2026-47334)

Tristan Madani and Trevor Lawrence have each independently discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a NULL pointer dereference when handling AppArmor network socket mediation. A local attacker could use this to cause a kernel oops. (CVE-2026-47337)

A security issue was discovered in the Linux kernel. An attacker could possibly use this to compromise the system. This update corrects flaws in the following subsystem: - RDS protocol; (CVE-2026-43494)

Affected Software

113 affected componentsFixes available
Linux Linux kernel
All of the following
ubuntu/linux-image-7.0.0-1005-gcp<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1005-gcp-64k<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1005-oracle<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1005-oracle-64k<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1006-aws<7.0.0-1006.6
7.0.0-1006.6
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1006-aws-64k<7.0.0-1006.6
7.0.0-1006.6
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1007-ibm<7.0.0-1007.7
7.0.0-1007.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1009-nvidia<7.0.0-1009.9
7.0.0-1009.9
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1009-nvidia-64k<7.0.0-1009.9
7.0.0-1009.9
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1011-raspi<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-raspi-realtime<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-22-generic<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-22-generic-64k<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-22-realtime<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-22-realtime-64k<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws<7.0.0-1006.6
7.0.0-1006.6
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws-64k<7.0.0-1006.6
7.0.0-1006.6
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws-64k-7.0<7.0.0-1006.6
7.0.0-1006.6
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-aws-7.0<7.0.0-1006.6
7.0.0-1006.6
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp-64k<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp-64k-7.0<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-gcp-7.0<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-64k<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-64k-7.0<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-64k-hwe-26.04<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-7.0<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-generic-hwe-26.04<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-ibm<7.0.0-1007.7
7.0.0-1007.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-ibm-7.0<7.0.0-1007.7
7.0.0-1007.7
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-nvidia<7.0.0-1009.9
7.0.0-1009.9
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-nvidia-64k<7.0.0-1009.9
7.0.0-1009.9
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-nvidia-64k-7.0<7.0.0-1009.9
7.0.0-1009.9
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-nvidia-7.0<7.0.0-1009.9
7.0.0-1009.9
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle-64k<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle-64k-7.0<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle-7.0<7.0.0-1005.5
7.0.0-1005.5
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-raspi<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-raspi-7.0<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-raspi-realtime<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-raspi-realtime-7.0<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-64k<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-64k-7.0<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-64k-hwe-26.04<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-7.0<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-realtime-hwe-26.04<7.0.0-22.22.1
7.0.0-22.22.1
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-virtual<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-virtual-7.0<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-virtual-hwe-26.04<7.0.0-22.22
7.0.0-22.22
Ubuntu Ubuntu=26.04
ubuntu/linux<7.0.0-22.22
7.0.0-22.22
ubuntu/linux-aws<7.0.0-1006.6
7.0.0-1006.6
ubuntu/linux-gcp<7.0.0-1005.5
7.0.0-1005.5
ubuntu/linux-ibm<7.0.0-1007.7
7.0.0-1007.7
ubuntu/linux-nvidia<7.0.0-1009.9
7.0.0-1009.9
ubuntu/linux-oracle<7.0.0-1005.5
7.0.0-1005.5
ubuntu/linux-raspi<7.0.0-1011.11
7.0.0-1011.11
ubuntu/linux-realtime<7.0.0-22.22.1
7.0.0-22.22.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1005-gcp to a version that resolves this vulnerability.

    Fixed in 7.0.0-1005.5
  2. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1005-gcp-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1005.5
  3. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1005-oracle to a version that resolves this vulnerability.

    Fixed in 7.0.0-1005.5
  4. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1005-oracle-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1005.5
  5. Upgrade

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

    Fixed in 7.0.0-1006.6
  6. Upgrade

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

    Fixed in 7.0.0-1006.6
  7. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1007-ibm to a version that resolves this vulnerability.

    Fixed in 7.0.0-1007.7
  8. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1009-nvidia to a version that resolves this vulnerability.

    Fixed in 7.0.0-1009.9
  9. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1009-nvidia-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-1009.9
  10. Upgrade

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

    Fixed in 7.0.0-1011.11
  11. Upgrade

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

    Fixed in 7.0.0-1011.11
  12. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-22-generic to a version that resolves this vulnerability.

    Fixed in 7.0.0-22.22
  13. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-22-generic-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-22.22
  14. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-22-realtime to a version that resolves this vulnerability.

    Fixed in 7.0.0-22.22.1
  15. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-22-realtime-64k to a version that resolves this vulnerability.

    Fixed in 7.0.0-22.22.1
  16. Upgrade

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

    Fixed in 7.0.0-1006.6
  17. Upgrade

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

    Fixed in 7.0.0-1006.6
  18. Upgrade

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

    Fixed in 7.0.0-1006.6
  19. Upgrade

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

    Fixed in 7.0.0-1006.6
  20. Upgrade

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

    Fixed in 7.0.0-1005.5
  21. Upgrade

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

    Fixed in 7.0.0-1005.5
  22. Upgrade

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

    Fixed in 7.0.0-1005.5
  23. Upgrade

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

    Fixed in 7.0.0-1005.5
  24. Upgrade

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

    Fixed in 7.0.0-22.22
  25. Upgrade

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

    Fixed in 7.0.0-22.22
  26. Upgrade

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

    Fixed in 7.0.0-22.22
  27. Upgrade

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

    Fixed in 7.0.0-22.22
  28. Upgrade

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

    Fixed in 7.0.0-22.22
  29. Upgrade

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

    Fixed in 7.0.0-22.22
  30. Upgrade

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

    Fixed in 7.0.0-1007.7
  31. Upgrade

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

    Fixed in 7.0.0-1007.7
  32. Upgrade

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

    Fixed in 7.0.0-1009.9
  33. Upgrade

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

    Fixed in 7.0.0-1009.9
  34. Upgrade

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

    Fixed in 7.0.0-1009.9
  35. Upgrade

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

    Fixed in 7.0.0-1009.9
  36. Upgrade

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

    Fixed in 7.0.0-1005.5
  37. Upgrade

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

    Fixed in 7.0.0-1005.5
  38. Upgrade

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

    Fixed in 7.0.0-1005.5
  39. Upgrade

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

    Fixed in 7.0.0-1005.5
  40. Upgrade

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

    Fixed in 7.0.0-1011.11
  41. Upgrade

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

    Fixed in 7.0.0-1011.11
  42. Upgrade

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

    Fixed in 7.0.0-1011.11
  43. Upgrade

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

    Fixed in 7.0.0-1011.11
  44. Upgrade

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

    Fixed in 7.0.0-22.22.1
  45. Upgrade

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

    Fixed in 7.0.0-22.22.1
  46. Upgrade

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

    Fixed in 7.0.0-22.22.1
  47. Upgrade

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

    Fixed in 7.0.0-22.22.1
  48. Upgrade

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

    Fixed in 7.0.0-22.22.1
  49. Upgrade

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

    Fixed in 7.0.0-22.22.1
  50. Upgrade

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

    Fixed in 7.0.0-22.22
  51. Upgrade

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

    Fixed in 7.0.0-22.22
  52. Upgrade

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

    Fixed in 7.0.0-22.22
  53. Upgrade

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

    Fixed in 7.0.0-22.22
  54. Upgrade

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

    Fixed in 7.0.0-1006.6
  55. Upgrade

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

    Fixed in 7.0.0-1005.5
  56. Upgrade

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

    Fixed in 7.0.0-1007.7
  57. Upgrade

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

    Fixed in 7.0.0-1009.9
  58. Upgrade

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

    Fixed in 7.0.0-1005.5
  59. Upgrade

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

    Fixed in 7.0.0-1011.11
  60. Upgrade

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

    Fixed in 7.0.0-22.22.1
  61. Upgrade

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

    Patch USN-8370-1

Event History

Jun 2, 2026
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software
Advisory Published
via OSV·01:52 PM
Data Sourced
via OSV·01:52 PM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Company

Resources

Contact

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