USN-8726-4: Linux kernel vulnerabilities

Published Sep 22, 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 A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges.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

21 affected componentsFixes available
Canonical Linux kernel
All of the following
ubuntu/linux-image-7.0.0-1011-oracle<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-oracle-64k<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-7.0.0-1014-azure<7.0.0-1014.14
7.0.0-1014.14
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-azure<7.0.0-1014.14
7.0.0-1014.14
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-azure-7.0<7.0.0-1014.14
7.0.0-1014.14
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-azure-lts-26.04<7.0.0-1014.14
7.0.0-1014.14
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle-64k<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle-64k-7.0<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04
All of the following
ubuntu/linux-image-oracle-7.0<7.0.0-1011.11
7.0.0-1011.11
Ubuntu Ubuntu=26.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 7.0.0-1011.11
  2. Upgrade

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

    Fixed in 7.0.0-1011.11
  3. Upgrade

    Upgrade ubuntu/linux-image-7.0.0-1014-azure to a version that resolves this vulnerability.

    Fixed in 7.0.0-1014.14
  4. Upgrade

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

    Fixed in 7.0.0-1014.14
  5. Upgrade

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

    Fixed in 7.0.0-1014.14
  6. Upgrade

    Upgrade ubuntu/linux-image-azure-lts-26.04 to a version that resolves this vulnerability.

    Fixed in 7.0.0-1014.14
  7. Upgrade

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

    Fixed in 7.0.0-1011.11
  8. Upgrade

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

    Fixed in 7.0.0-1011.11
  9. Upgrade

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

    Fixed in 7.0.0-1011.11
  10. Upgrade

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

    Fixed in 7.0.0-1011.11
  11. Upgrade

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

    Patch USN-8726-4

Event History

Sep 22, 2026
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Company

Resources

Contact

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