CVE Database›Document archive›CVE-2026-23268

CVE-2026-23268

kernel: AppArmor: Local privilege escalation and denial of service via confused deputy attack

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Severity

Important

Red Hat Product Security

7.8

CVSS 3.1

Review impact separately from score.

Published · March 18, 2026

Updated · August 20, 2026

Description

A flaw was found in the Linux kernel's AppArmor component. An unprivileged local user can exploit a confused deputy attack by manipulating a privileged process to write to AppArmor interfaces. This allows the user to load, replace, and remove security profiles, leading to full policy management. The consequences include bypassing user namespace restrictions, removing confinement, causing a Denial of Service (DoS) by denying application execution, and potentially exploiting other kernel bugs for local privilege escalation.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-403 · Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')