CVE-2026-47330: Use of uninitialized value in Ubuntu Linux AppArmor notification handling

Published May 28, 2026
·
Updated

Last updated 5 June 2026

Other sources

Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an uninitialized variable in notification handling code. The bug can be triggered by an unprivileged local user and can result in the incorrect caching of AppArmor notification responses.

— NVD

Affected Software

5 affected componentsFixes available
Canonical Ubuntu Linux=6.8, =7.17, =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-2026-47330?

The severity of CVE-2026-47330 is low with a score of 3.3.

2

How do I fix CVE-2026-47330?

To fix CVE-2026-47330, ensure that you are running a patched version of Ubuntu that addresses the issue.

3

What causes CVE-2026-47330?

CVE-2026-47330 is caused by the use of an uninitialized value in the AppArmor notification handling code.

4

Who can exploit CVE-2026-47330?

CVE-2026-47330 can be exploited by an unprivileged local user under specific circumstances.

5

What are the potential impacts of CVE-2026-47330?

The potential impact of CVE-2026-47330 includes the incorrect caching of AppArmor notification responses.

Company

Resources

Contact

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