CVE-2025-48556
📋 TL;DR
This vulnerability in Android's NotificationChannel component allows local privilege escalation through improper input validation. Attackers can exploit desynchronization issues to gain elevated privileges without additional execution permissions, though user interaction is required. All Android devices running vulnerable versions are affected.
💻 Affected Systems
- Android
📦 What is this software?
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing attackers to execute arbitrary code with system privileges, access sensitive data, and persist malware.
Likely Case
Limited privilege escalation allowing access to other apps' data or system settings, potentially leading to data theft or further exploitation.
If Mitigated
Minimal impact with proper app sandboxing and security updates applied; exploitation attempts would be blocked or detected.
🎯 Exploit Status
Exploitation requires user interaction and local access. No public exploit code available as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: September 2025 Android Security Patch or later
Vendor Advisory: https://source.android.com/security/bulletin/2025-09-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Install September 2025 security patch or later. 3. Reboot device after installation completes.
🔧 Temporary Workarounds
Disable unknown app sources
androidPrevents installation of malicious apps that could exploit this vulnerability
Settings > Security > Install unknown apps > Disable for all apps
Restrict notification permissions
androidLimit which apps can create notification channels
Settings > Apps & notifications > Notifications > App notifications > Review permissions
🧯 If You Can't Patch
- Isolate vulnerable devices from sensitive networks and data
- Implement application allowlisting to prevent unauthorized app installations
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version > Security patch level. If before September 2025, device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify security patch level shows September 2025 or later after update.📡 Detection & Monitoring
Log Indicators:
- Unusual notification channel creation/modification attempts
- Privilege escalation attempts in system logs
Network Indicators:
- Not applicable - local exploitation only
SIEM Query:
source="android_system_logs" AND (event="notification_channel_manipulation" OR privilege_escalation_attempt=true)