CVE-2026-47329: Incorrect validation of field size in Ubuntu Linux AppArmor notification responses

Published May 28, 2026
·
Updated

Last updated 5 June 2026

Other sources

Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches which fail to validate invalid sizes of the name field in AppAmor notification responses. The bug can be triggered by an unprivileged local user and could result in handling of crafted responses.

— NVD

Affected Software

5 affected componentsFixes available
Ubuntu Ubuntu Linux=6.8, =6.17, =7.0
debian/linux
5.10.223-15.10.257-16.1.170-36.1.174-16.12.86-16.12.90-27.0.10-1
Canonical Ubuntu Linux=24.04
Canonical Ubuntu Linux=25.10
Canonical Ubuntu Linux=26.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.10.223-1Fixed in 5.10.257-1Fixed in 6.1.170-3Fixed in 6.1.174-1Fixed in 6.12.86-1Fixed in 6.12.90-2Fixed in 7.0.10-1
  2. Upgrade

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

    Fixed in 5.10.223-1
  3. Upgrade

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

    Fixed in 5.10.257-1
  4. Upgrade

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

    Fixed in 6.1.170-3
  5. Upgrade

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

    Fixed in 6.1.174-1
  6. Upgrade

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

    Fixed in 6.12.86-1
  7. Upgrade

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

    Fixed in 6.12.90-2
  8. Upgrade

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

    Fixed in 7.0.10-1

Event History

May 28, 2026
CVE Published
via MITRE·06:27 PM
Data Sourced
via MITRE·06:27 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·07:16 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·07:16 PM
RemedyAffected Software
Jun 2, 2026
Data Sourced
via Launchpad·03:37 PM
Description
Jun 3, 2026
Data Sourced
via Debian·03:38 PM
DescriptionAffected Software
Jun 6, 2026
Data Sourced
via Ubuntu·03:40 PM
RemedyDescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-47329?

The severity of CVE-2026-47329 is rated low with a score of 3.3.

2

How do I fix CVE-2026-47329?

To fix CVE-2026-47329, ensure your Ubuntu system is updated to the latest version with the patched AppArmor functionality.

3

What impact does CVE-2026-47329 have on users?

CVE-2026-47329 can potentially allow unprivileged local users to exploit improperly validated field sizes in AppArmor notification responses.

4

What software is affected by CVE-2026-47329?

CVE-2026-47329 affects Canonical Ubuntu Linux versions 6.8, 6.17, and 7.0.

5

Who can exploit CVE-2026-47329?

CVE-2026-47329 can be exploited by unprivileged local users on affected versions of Ubuntu.

Company

Resources

Contact

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