CVE-2025-48577: Google Android Privilege Escalation Flaw

CVE-2025-48577 Overview

CVE-2025-48577 is a race condition vulnerability in multiple functions of KeyguardViewMediator.java within Google Android. This flaw allows a possible lockscreen bypass, enabling local escalation of privilege without requiring additional execution privileges. Critically, user interaction is not needed for exploitation, making this a significant security concern for Android device users.

Critical Impact

Local attackers can bypass the device lockscreen and escalate privileges without user interaction, potentially gaining unauthorized access to sensitive device data and functionality.

Affected Products

• Google Android 14.0
• Google Android 15.0
• Google Android 16.0

Discovery Timeline

• 2026-03-02 - CVE-2025-48577 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2025-48577

Vulnerability Analysis

This vulnerability exists in KeyguardViewMediator.java, a core Android system component responsible for managing the device lockscreen. The flaw stems from a race condition (CWE-362) that occurs when multiple functions within the KeyguardViewMediator class execute concurrently without proper synchronization.

The race condition creates a window of opportunity where the lockscreen's state can become inconsistent, allowing an attacker to bypass the security mechanism entirely. Since this is a local attack vector with high complexity requirements, the attacker must have physical access to the device or already have code execution capability on the system.

The impact is severe as successful exploitation leads to complete compromise of confidentiality, integrity, and availability of the device. An attacker bypassing the lockscreen gains direct access to user data, installed applications, and device functionality that should be protected behind authentication.

Root Cause

The root cause is a Time-of-Check Time-of-Use (TOCTOU) race condition within the KeyguardViewMediator component. The vulnerability occurs because the lockscreen state is checked at one point but can be modified by a concurrent operation before the checked state is used. This lack of atomic operations or proper mutex/lock mechanisms in critical sections allows the race condition to be triggered.

When the keyguard transitions between states (locked/unlocked), there exists a brief timing window where concurrent calls to different KeyguardViewMediator functions can manipulate the lockscreen state in an unintended sequence, ultimately resulting in the lockscreen being bypassed.

Attack Vector

The attack requires local access to the device. An attacker can trigger the race condition by precisely timing interactions with the lockscreen or by running code that manipulates the KeyguardViewMediator state transitions. The high complexity of exploitation stems from the need to win the race condition by executing operations in a specific timing window.

Since no user interaction is required and no special privileges are needed to initiate the attack, any code running on the device could potentially attempt to exploit this vulnerability. The exploitation mechanism involves triggering concurrent operations that interact with the lockscreen state management functions in KeyguardViewMediator.java.

For technical details on the specific vulnerable code paths, refer to the Android Security Bulletin March 2026.

Detection Methods for CVE-2025-48577

Indicators of Compromise

• Unexpected lockscreen dismissals or authentication bypasses logged in system events
• Anomalous activity in KeyguardViewMediator component logs indicating rapid state transitions
• Evidence of unauthorized access to protected applications or data following lockscreen display
• System logs showing concurrent keyguard state change operations with timing anomalies

Detection Strategies

• Monitor Android system logs for abnormal KeyguardViewMediator activity patterns
• Implement device integrity monitoring to detect unauthorized lockscreen bypasses
• Use mobile threat defense solutions capable of identifying exploitation attempts against system components
• Enable enhanced logging on managed devices to capture lockscreen state transition events

Monitoring Recommendations

• Deploy SentinelOne Singularity Mobile to detect anomalous behavior patterns on Android devices
• Configure audit logging for authentication and lockscreen events on enterprise-managed devices
• Implement behavioral analytics to identify unusual device unlock patterns or timing
• Monitor for privilege escalation attempts following device access events

How to Mitigate CVE-2025-48577

Immediate Actions Required

• Apply the March 2026 Android security patch immediately on all affected devices
• Ensure devices are configured to receive automatic security updates
• Prioritize patching for devices containing sensitive data or with elevated privileges
• Consider additional device security measures such as biometric authentication while awaiting patches

Patch Information

Google has addressed this vulnerability in the March 2026 Android Security Bulletin. Organizations should ensure all Android devices running versions 14.0, 15.0, and 16.0 are updated to the latest security patch level. The fix implements proper synchronization mechanisms in the KeyguardViewMediator component to prevent the race condition from being exploited.

For detailed patch information and download links, refer to the Android Security Bulletin March 2026.

Workarounds

• Enable additional authentication factors (biometrics, strong PIN) as defense-in-depth
• Implement mobile device management (MDM) policies requiring current security patch levels
• Restrict physical access to sensitive devices until patches can be applied
• Consider enabling lockdown mode on critical devices which forces PIN/password authentication

# Verify Android security patch level on device
adb shell getprop ro.build.version.security_patch
# Expected output should be 2026-03-01 or later for patched devices