CVE-2026-56992: Confused Deputy Privilege Escalation Flaw

CVE-2026-56992 Overview

CVE-2026-56992 is a permission bypass vulnerability affecting Android. The flaw stems from a confused deputy condition [CWE-441] present across multiple files. An authorized local actor with System execution privileges can abuse the confused deputy to bypass permission checks and achieve local privilege escalation. Exploitation does not require user interaction. Google documented the issue in the Android Security Bulletin September 2026.

Critical Impact
A local attacker holding System privileges can bypass permission enforcement and escalate privileges on the affected Android device without any user interaction.

Affected Products

Android (Pixel components referenced in the September 2026 Pixel bulletin)
Multiple source files across the Android platform (per vendor advisory)
Devices pending the September 2026 Android security patch level

Discovery Timeline

2026-09-15 - CVE-2026-56992 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-56992

Vulnerability Analysis

The vulnerability is a confused deputy condition [CWE-441] spanning multiple files in the affected Android components. A confused deputy occurs when a privileged component performs an action on behalf of a less-privileged caller without correctly validating the caller's authority. In this case, the privileged deputy honors requests that should be rejected, allowing permission checks to be circumvented. The outcome is local escalation of privilege on the affected device.

Exploitation is local and does not require user interaction. The attacker must already hold System execution privileges to reach the vulnerable code paths. Once triggered, the flaw enables access to resources or operations that policy would otherwise deny.

Root Cause

The root cause is improper transfer of authority between components. The deputy code trusts the caller-supplied context or identity rather than resolving the true originator of a request. Because the pattern repeats across multiple files, remediation requires vendor-supplied patches rather than a single call-site fix.

Attack Vector

The attack vector is local. An attacker running with System privileges invokes the affected interfaces and induces the deputy to perform privileged operations on their behalf. Refer to the Android Security Bulletin September 2026 for authoritative technical details. No public proof-of-concept, exploit code, or CISA KEV listing exists for this issue at publication.

No verified exploit code is available. Refer to the vendor advisory for technical details.

Detection Methods for CVE-2026-56992

Indicators of Compromise

No public indicators of compromise have been published for CVE-2026-56992.
Review device logs for unexpected privileged operations initiated by System-context processes on unpatched builds.

Detection Strategies

Inventory Android devices and compare the reported security patch level against the September 2026 Android bulletin baseline.
Alert on processes running with System privileges that invoke sensitive platform APIs outside of expected workflows.
Correlate mobile device management (MDM) compliance data with device build fingerprints to identify hosts missing the September 2026 patch.

Monitoring Recommendations

Ingest Android device telemetry and MDM posture data into a centralized analytics pipeline for continuous patch-level monitoring.
Track privileged system service invocations and flag anomalous callers or caller-identity mismatches.
Monitor vendor bulletin updates for any revisions to the CVE-2026-56992 entry or newly listed affected components.

How to Mitigate CVE-2026-56992

Immediate Actions Required

Apply the September 2026 Android security patch level or later to all managed Android and Pixel devices.
Enforce minimum patch-level compliance through MDM policy and block non-compliant devices from sensitive resources.
Restrict sideloading and installation of applications that could be pre-positioned to abuse System-level access after further compromise.

Patch Information

Google addressed CVE-2026-56992 in the September 2026 Android Security Bulletin. Consult the Android Security Bulletin September 2026 for the definitive list of affected components and the corresponding source patches. Device manufacturers ship the fixes through their monthly firmware updates.

Workarounds

No vendor-supplied workaround is documented; applying the September 2026 patch level is the supported remediation.
Reduce risk by limiting installation of apps from untrusted sources and by enforcing least-privilege configurations on managed devices.
For devices that cannot receive the patch, isolate them from sensitive corporate data and accelerate hardware refresh.

bash

# Verify the Android security patch level on a connected device
adb shell getprop ro.build.version.security_patch
# Expected output: 2026-09-01 or later