AppArmor Notification Handling Uninitialized Variable in Ubuntu Linux

Publication date: 2026-05-28

Last updated on: 2026-06-09

Assigner: Canonical Ltd.

Description

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.

CVSS Scores

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Meta Information

Published

2026-05-28

Last Modified

2026-06-09

Generated

2026-07-08

AI Q&A

2026-05-28

EPSS Evaluated

2026-07-06

NVD

CVE-2026-47330

EUVD

EUVD-2026-32985

Affected Vendors & Products

Vendor	Product	Version / Range
canonical	ubuntu_linux	24.04
canonical	ubuntu_linux	25.10
canonical	ubuntu_linux	26.04

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-457	The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Ubuntu Linux versions 6.8, 7.17, and 7.0, specifically in the AppArmor SAUCE patches. Under certain conditions, an unprivileged local user can trigger a bug caused by the use of an uninitialized variable in the notification handling code. This can lead to incorrect caching of AppArmor notification responses.

Impact Analysis

The vulnerability allows an unprivileged local user to cause incorrect caching of AppArmor notification responses. While it does not directly impact confidentiality or availability, it can affect the integrity of the notification handling process within AppArmor, potentially leading to misleading or incorrect security notifications.

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