CVE-2026-47331
Analyzed Analyzed - Analysis Complete
AppArmor Race Condition in Ubuntu Linux 6.8 Leads to Use-After-Free

Publication date: 2026-05-28

Last updated on: 2026-06-09

Assigner: Canonical Ltd.

Description
Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.
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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-2026-47331
EUVD
EUVD-2026-32986
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-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability exists in Ubuntu Linux 6.8 where the AppArmor SAUCE patches fail to properly acquire a lock when modifying a linked list. This flaw allows an unprivileged local user to trigger a race condition that can lead to a use-after-free (UAF) situation.

The use-after-free condition can potentially be exploited to execute arbitrary code on the affected system.

Impact Analysis

An unprivileged local user could exploit this vulnerability to execute arbitrary code on the system.

  • This could lead to full compromise of the affected system.
  • Confidentiality, integrity, and availability of the system could be severely impacted.
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