CVE-2026-47333
Analyzed Analyzed - Analysis Complete
Heap Out-of-Bounds Read in Ubuntu Linux AppArmor

Publication date: 2026-05-28

Last updated on: 2026-06-09

Assigner: Canonical Ltd.

Description
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.
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Meta Information
Published
2026-05-28
Last Modified
2026-06-09
Generated
2026-06-18
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-47333
EUVD
EUVD-2026-32988
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
canonical ubuntu_linux 24.04
canonical ubuntu_linux 25.10
canonical ubuntu_linux 26.04
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability exists in Ubuntu Linux versions 6.8, 6.17, and 7.0, specifically in the AppArmor SAUCE patches. It involves an incorrect computation of the size of an internal buffer, which can lead to a heap memory out-of-bounds read during notification handling.

An unprivileged local user can trigger this bug, causing the AppArmor DFA policy engine to process invalid data.

Impact Analysis

The vulnerability can be exploited by an unprivileged local user to cause a heap memory out-of-bounds read, which may lead to the processing of invalid data by the AppArmor policy engine.

According to the CVSS score (7.8), the impact includes high confidentiality, integrity, and availability risks, meaning it could allow unauthorized access to sensitive information, modification of data, or disruption of system operations.

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