CVE-2026-0192: Bootloader Privilege Escalation Vulnerability

CVE-2026-0192 Overview

CVE-2026-0192 is a local privilege escalation vulnerability in the Android Bootloader component. The flaw stems from a missing permission check [CWE-862] that allows an attacker with existing System-level execution privileges to escalate further within the device. Exploitation requires no user interaction. Google disclosed the issue in the Android Security Bulletin for September 2026.

Critical Impact
An attacker holding System execution privileges can bypass permission enforcement in the Bootloader to gain elevated privileges, compromising device confidentiality, integrity, and availability.

Affected Products

Android Bootloader component (as tracked in the Pixel/Android Security Bulletin)
Google Pixel devices covered by the September 2026 bulletin
Downstream Android builds inheriting the affected Bootloader code

Discovery Timeline

2026-09-15 - CVE-2026-0192 published to the National Vulnerability Database (NVD)
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-0192

Vulnerability Analysis

The vulnerability resides in the Android Bootloader, a low-level component that initializes hardware and loads the operating system. A code path within the Bootloader fails to enforce a required permission check before performing a privileged operation. An attacker who already holds System execution privileges can invoke this path and obtain elevated privileges beyond the System context.

The issue is classified under [CWE-862] Missing Authorization. Because the Bootloader operates at a trust level below the Android runtime, successful exploitation can undermine platform integrity guarantees such as verified boot and partition protection.

Root Cause

The Bootloader exposes a privileged operation without validating that the calling context is authorized to perform it. The absent authorization check enables callers running with System privileges to reach functionality intended to be restricted to a higher trust boundary.

Attack Vector

Exploitation is local and requires no user interaction. The attacker must first achieve System execution privileges on the device, typically by chaining an earlier vulnerability or by compromising a privileged process. From that position, the attacker invokes the unprotected Bootloader interface to escalate privileges.

No public proof-of-concept exploit has been published. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Refer to the Android Security Bulletin September 2026 for component-level technical detail.

Detection Methods for CVE-2026-0192

Indicators of Compromise

Unexpected modifications to bootloader partitions or boot images observed during device attestation
Verified boot state transitions from GREEN to YELLOW or ORANGE on managed devices
Privileged processes spawning unexpected child processes or accessing bootloader interfaces at runtime

Detection Strategies

Enroll managed Android devices in attestation services and alert on failed key attestation or boot state changes
Monitor mobile device management (MDM) telemetry for security patch level regressions or missing September 2026 patches
Correlate System-privileged process activity with subsequent reboot or firmware update events

Monitoring Recommendations

Track the Android ro.build.version.security_patch property across the fleet and flag devices below 2026-09-01
Ingest MDM and Android Enterprise compliance events into a centralized data lake for longitudinal analysis
Alert on integrity verification failures reported by SafetyNet or Play Integrity API responses

How to Mitigate CVE-2026-0192

Immediate Actions Required

Apply the September 2026 Android security patch level (2026-09-01 or later) to all affected devices
Identify unpatched devices through MDM inventory and prioritize remediation for privileged user populations
Restrict installation of untrusted applications that could serve as the initial foothold to reach System privileges

Patch Information

Google addressed CVE-2026-0192 in the September 2026 Android Security Bulletin. Device manufacturers integrate the fix into their monthly over-the-air updates. See the Android Security Bulletin September 2026 for the corresponding source patch references and affected component metadata.

Workarounds

No vendor-supplied workaround exists; patching is the only supported remediation
Enforce MDM policies that block sideloading and require Play Protect to remain enabled
Require verified boot and reject enrollment of devices reporting a tampered boot state

bash

# Verify the Android security patch level on a connected device
adb shell getprop ro.build.version.security_patch

# Expected output should be 2026-09-01 or later
# 2026-09-01