CVE-2026-47336: Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules

Published May 28, 2026
·
Updated

Last updated 5 June 2026

Other sources

Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AFINET/AFINET6 socket mediation code. The bug can be triggered by an unprivileged local user and could result in incorrect fine-grained mediation of network sockets.

— MITRE

Affected Software

3 affected componentsFixes available
Ubuntu Ubuntu Linux=6.8
Canonical Ubuntu Linux=6.8
debian/linux
5.10.223-15.10.257-16.1.170-36.1.174-16.12.86-16.12.90-27.0.10-1

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·06:29 PM
Data Sourced
via MITRE·06:29 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·07:16 PM
DescriptionSeverityWeaknessAffected Software
Jun 2, 2026
Data Sourced
via Launchpad·05:39 PM
Description
Jun 3, 2026
Data Sourced
via Debian·05:39 PM
DescriptionAffected Software
Jun 6, 2026
Data Sourced
via Ubuntu·05:41 PM
RemedyDescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-47336?

The severity of CVE-2026-47336 is classified as low with a score of 3.3.

2

How do I fix CVE-2026-47336?

To fix CVE-2026-47336, you should update to the latest version of Ubuntu that includes the patched AppArmor socket mediation code.

3

What impact does CVE-2026-47336 have on system security?

CVE-2026-47336 can potentially allow an unprivileged local user to exploit incorrect mediation of network sockets, affecting fine-grained security controls.

4

Which versions of Ubuntu are affected by CVE-2026-47336?

CVE-2026-47336 affects Ubuntu Linux 6.8 that includes specific SAUCE patches.

5

Who can exploit CVE-2026-47336?

CVE-2026-47336 can be exploited by unprivileged local users.

Company

Resources

Contact

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