CVE-2026-47333: Out-of-bounds read in Ubuntu Linux AppArmor notification handling

Published May 28, 2026
·
Updated

Last updated 5 June 2026

Other sources

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the size of an internal buffer, leading to a heap memory out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result in invalid data being processed by the AppArmor DFA policy engine.

— NVD

Affected Software

5 affected componentsFixes available
Canonical Apparmor=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·06:28 PM
Data Sourced
via MITRE·06:28 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-2026-47333?

The severity of CVE-2026-47333 is high, with a CVSS score of 7.8.

2

How do I fix CVE-2026-47333?

To fix CVE-2026-47333, update your Ubuntu system to the latest version that includes the necessary patches for AppArmor.

3

Who is affected by CVE-2026-47333?

CVE-2026-47333 affects Ubuntu Linux versions 6.8, 6.17, and 7.0 that implement AppArmor.

4

What are the consequences of CVE-2026-47333?

The consequences of CVE-2026-47333 include potential heap memory out-of-bounds read which can lead to invalid data exposure.

5

Can CVE-2026-47333 be exploited by unprivileged users?

Yes, CVE-2026-47333 can be triggered by an unprivileged local user.

Company

Resources

Contact

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