AppArmor SAUCE UAF in Ubuntu 6.8 kernel due to missing lock
CVE-2026-47331 Published on May 28, 2026

Use-after-free in Ubuntu Linux AppArmor notification handling
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.

NVD

Vulnerability Analysis

CVE-2026-47331 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2026-47331 has been classified to as a Dangling pointer vulnerability or weakness.


Products Associated with CVE-2026-47331

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Canonical Ubuntu Linux
 

Affected Versions

Canonical Ubuntu Linux: