CVE-2026-56922 Overview
CVE-2026-56922 is a permission bypass vulnerability in the CPM component, addressed in the Android Security Bulletin for September 2026. The flaw stems from a confused deputy condition, where a privileged component performs actions on behalf of a less-privileged caller without properly validating authority. Successful exploitation enables local escalation of privilege to System execution level. No user interaction is required to trigger the issue.
Critical Impact
A local attacker with high privileges can bypass permission checks in CPM and execute code with System privileges, compromising the integrity of the affected device.
Affected Products
- Android platform (CPM component) as referenced in the Android Security Bulletin September 2026
- Pixel devices covered by the September 2026 Pixel Update Bulletin
- Downstream Android distributions incorporating the vulnerable CPM component
Discovery Timeline
- 2026-09-15 - CVE-2026-56922 published to the National Vulnerability Database (NVD)
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-56922
Vulnerability Analysis
The vulnerability is classified under [CWE-441] Unintended Proxy or Intermediary (Confused Deputy). CPM acts as a trusted intermediary that performs privileged operations. When the component does not correctly attribute the source of a request, a lower-privileged caller can induce it to perform actions using CPM's higher authority. The result is a permission bypass that yields System-level execution on the device.
Exploitation requires local access and an existing high-privilege context on the device. User interaction is not needed. Because CPM operates with elevated capabilities, the confused deputy pattern enables the attacker to reach resources and APIs otherwise gated by the Android permission model.
Root Cause
The root cause is missing or insufficient identity and permission propagation inside the CPM component. A privileged process accepts an operation request without validating whether the originating caller holds the permission required for the target action. CPM then performs the action under its own authority, effectively laundering privilege from the requesting context.
Attack Vector
The attack vector is local. An attacker executing code on the device with high privileges issues a crafted request to CPM that references an operation or resource the attacker cannot access directly. CPM performs the operation using its own identity, granting the attacker System execution privileges. Refer to the Android Security Bulletin September 2026 for component-specific details.
No verified public exploit code is available. The vulnerability mechanism is described in prose in the vendor advisory rather than in a published proof of concept.
Detection Methods for CVE-2026-56922
Indicators of Compromise
- Unexpected invocations of CPM interfaces originating from non-system application contexts on affected Android builds
- Processes running with System UID that were spawned or influenced by third-party or user-installed application components
- Anomalous access to system settings, protected content providers, or privileged services following CPM interactions
Detection Strategies
- Review Android platform logs (logcat, dropbox, and audit logs) for CPM operations attributed to callers that lack the corresponding manifest permissions
- Correlate binder transactions targeting CPM with the calling UID and package to identify authority mismatches
- Deploy mobile threat defense sensors capable of flagging local privilege escalation behaviors and unexpected System-level process creation
Monitoring Recommendations
- Track installation of applications requesting extensive permissions on unpatched Android builds
- Monitor device patch level against the September 2026 Android Security Bulletin baseline through mobile device management (MDM)
- Alert on processes that transition to System UID outside of expected boot and update workflows
How to Mitigate CVE-2026-56922
Immediate Actions Required
- Apply the September 2026 Android security patch level (2026-09-01 or later) to all affected devices
- Prioritize patch deployment on Pixel devices and OEM builds that consume the CPM component
- Restrict installation of untrusted applications on devices pending patch deployment through MDM policy
Patch Information
Google addressed CVE-2026-56922 in the September 2026 Android Security Bulletin. Device manufacturers should ship the fix with the 2026-09-01 security patch level or later. Consult the Android Security Bulletin September 2026 for the authoritative fix reference and device-specific rollout guidance.
Workarounds
- No vendor-supplied workaround has been published; patching is the required remediation
- Enforce least-privilege application installation policies through MDM until patches are applied
- Disable or remove non-essential privileged applications that could act as launching contexts for local escalation attempts
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
