CVE-2025-48631 — Android Denial-of-Service Vulnerability (Detailed Security Analysis)

CVE-2025-48631 is a high-severity vulnerability affecting the Android Framework that can allow attackers to trigger a remote denial-of-service (DoS) condition on affected devices. It stems from improper resource handling inside a system component responsible for processing image headers. (SecurityVulnerability.io)

Published: Dec 8 2025 (SecurityVulnerability.io)
Affected versions: Android 13–16 (cve.enginsight.com)
Severity: CVSS up to 7.5 (High) (cve.enginsight.com)
Attack vector: Network-based, no privileges required (cve.enginsight.com)
User interaction: Not required (cve.enginsight.com)

This makes it particularly dangerous because attackers can exploit it remotely without convincing users to click anything or install apps.

2. Technical Root Cause

The flaw exists in:

onHeaderDecoded method of LocalImageResolver.java (SecurityVulnerability.io)

It results from:

Uncontrolled resource consumption (CWE-400) (NVD)
Allocation without limits or throttling (CWE-770) (NVD)

In simple terms:

The system processes crafted data that forces it to allocate excessive memory or resources until it crashes or becomes unusable.

This type of weakness is common in parsing routines that handle images, media, or external input.

3. Attack Impact

If exploited successfully, attackers could:

Primary Effects

Crash system services
Freeze device interface
Trigger persistent reboots
Render device unusable until reset

Organizational Risk

Enterprise fleets using Android devices (kiosks, POS, work phones) could experience:

Service disruption
Operational downtime
Incident response costs

4. Real-World Context

Google’s December 2025 Android security update fixed 107 vulnerabilities, including this one. (Tom's Guide)

Security analysts noted:

Two zero-days were actively exploited in targeted attacks (other CVEs) (Tom's Guide)
CVE-2025-48631 was patched as part of the same update batch (TechRadar)

This shows:

Attackers are actively researching Android framework bugs, and even non-zero-day flaws can become dangerous if left unpatched.

5. Attack Scenario (Conceptual Only)

(High-level explanation for defensive understanding — no exploit steps provided)

Possible attack chain:

Attacker sends specially crafted input to device
Android processes the malicious data
System component allocates excessive resources
Device crashes or becomes unresponsive

Because no privileges are required, this could theoretically occur via:

Network services
Media parsing
Messaging channels
App-to-system interactions

6. Why DoS Bugs Matter

Many assume DoS is less severe than code execution. In reality:

DoS vulnerabilities can be strategic attack tools

They are often used for:

Disruption attacks
Ransom scenarios
Attack chain preparation
Security bypass attempts

Research shows that exhausting system resources is a recurring Android attack technique capable of causing system instability or reboots even without permissions. (arXiv)

7. Detection Methods (Defensive Tools)

Security teams can detect exploitation attempts using:

Tool Type	Examples	Purpose
Mobile Threat Defense	Lookout, Zimperium	Detect abnormal crashes
Log Monitoring	Android Logcat analysis	Identify repeated failures
SIEM Integration	Splunk, ELK	Correlate crash events
Behavioral Analysis	EDR for mobile	Detect anomaly patterns

Indicators of Possible Exploitation

Sudden system crashes after receiving data
Memory spikes
Repeated service restarts
Kernel or framework errors

8. Mitigation & Protection

Immediate Fix

Install latest Android security patches

Google strongly advises updating devices immediately after security releases. (Tom's Guide)

Organizational Controls

Enterprise Mobile Security Policy

Enforce patch compliance
Block outdated devices
Monitor patch levels

Hardening Measures

Restrict unknown data inputs
Disable unnecessary services
Use mobile security solutions

Developer Protections

Developers can prevent similar bugs by:

Implementing resource limits
Validating input sizes
Applying timeouts
Using safe parsing libraries

9. Secure Implementation Guidance (For Defenders)

If you manage Android systems or apps:

Recommended Defensive Workflow

Track vulnerability advisories
Assess exposure
Test patches
Deploy updates
Monitor logs
Conduct validation testing

10. Comparison With Related Android Vulnerabilities

CVE	Type	Risk
CVE-2025-48631	DoS	Device crash
CVE-2025-48633	Info disclosure	Data leakage (Tom's Guide)
CVE-2025-48572	Privilege escalation	System compromise (Tom's Guide)

Attackers often chain vulnerabilities:

DoS → info leak → privilege escalation → full compromise

11. Security Lessons Learned

This vulnerability highlights key mobile security principles:

Input parsing is a critical attack surface
Resource limits are essential
Even non-privileged flaws can be dangerous
Patch latency increases risk

12. Executive Summary

CVE-2025-48631 is a high-severity Android Framework vulnerability enabling remote denial-of-service attacks without user interaction or privileges. It results from uncontrolled resource allocation during image processing. Affected Android versions include 13–16, and the flaw was patched in the December 2025 security update.

Risk level: High
Exploit complexity: Low
Fix: Install security updates immediately

CVE-2025-48633 — Android Critical Information Disclosure (Zero-Day Exploited in the Wild)

CVE-2025-48633 is a high-severity information disclosure vulnerability affecting the Android Framework, specifically within the DevicePolicyManagerService component. The flaw was identified as a zero-day vulnerability after being observed in limited, real-world exploitation prior to public disclosure and patching.
Although it does not allow remote code execution, the vulnerability is particularly dangerous because it enables unauthorized access to sensitive system information, which can be leveraged as part of larger, multi-stage attack chains. Google addressed the issue in the December 2025 Android Security Bulletin, urging users and enterprises to apply updates immediately.
This vulnerability highlights a recurring and critical problem in mobile security: information disclosure flaws that quietly enable deeper compromise when combined with other vulnerabilities or malicious applications.

Technical Summary

🔹 Vulnerability Identifier

CVE ID: CVE-2025-48633
Severity: High
Type: Information Disclosure
Attack Vector: Local (malicious app or local access)
Exploitation Status: Actively exploited (limited scope)
Affected Component: DevicePolicyManagerService
Patched: December 2025 Android Security Update

What Is the Vulnerability?

CVE-2025-48633 stems from a logic flaw in Android’s DevicePolicyManagerService, specifically within the method:

hasAccountsOnAnyUser()

This method is intended to return account-related information only to callers with appropriate privileges. However, due to insufficient permission validation, certain unauthorized processes can query sensitive device or user state data.

What Makes This Dangerous?

The flaw allows an attacker to:

Bypass intended permission checks
Query account-related metadata
Infer security posture or configuration details
Gather information useful for follow-on attacks

Importantly, the vulnerability does not require root access and can be exploited by a malicious local application, making it particularly relevant in:

Bring-Your-Own-Device (BYOD) environments
Enterprise Android deployments
Devices with sideloaded or third-party apps

Real-World Exploitation

🔥 Zero-Day Status

Google confirmed that CVE-2025-48633 was:

Exploited in the wild
Used in targeted attacks
Detected before a patch was available

This led to its classification as a zero-day vulnerability in the December 2025 Android Security Bulletin.

🎯 Scope of Exploitation

While not mass-exploited, the vulnerability was used in:

Targeted surveillance operations
Advanced persistent threat (APT) activity
Reconnaissance stages of mobile exploitation chains

Security researchers believe it was primarily used to:

Gather device intelligence
Identify high-value targets
Enable chaining with privilege-escalation exploits

Why Information Disclosure Vulnerabilities Matter

At first glance, information disclosure bugs may seem less severe than remote code execution flaws. However, in real-world attacks, they often play a critical enabling role.

How Attackers Use This Type of Vulnerability

Reconnaissance
- Identify device configuration
- Determine OS version and patch level
- Detect enterprise security controls
Exploit Chaining
- Combine with privilege escalation bugs
- Assist in sandbox escapes
- Aid exploit reliability
Persistence & Evasion
- Detect security tools
- Avoid triggering defenses
- Customize payload behavior
Credential or Token Exposure
- Leak account-related metadata
- Assist in lateral movement

In modern mobile attacks, information disclosure is often the first step, not the last.

Affected Android Versions

According to Google and third-party security researchers, CVE-2025-48633 impacts:

Android 13
Android 14
Android 15
Android 16 (early builds)

Because Android is heavily fragmented, the real-world risk depends on:

OEM patching speed
Carrier update delays
Whether devices receive monthly security updates

Patch and Mitigation Details

✅ Official Fix

Google resolved the issue in the:

December 2025 Android Security Bulletin
Patch level: 2025-12-01 or later

The fix corrects the permission enforcement logic in DevicePolicyManagerService, preventing unauthorized access to account-related data.

Recommended Mitigation Steps

For End Users

Update Android immediately
Verify security patch level is December 2025 or newer
Avoid installing apps from untrusted sources

For Enterprises

Enforce minimum patch levels via MDM
Monitor devices for outdated firmware
Restrict sideloading
Enable Google Play Protect
Audit DevicePolicyManager access logs where possible

For Security Teams

Monitor for abnormal API usage
Look for suspicious app behavior
Correlate with other Android zero-days
Assume compromise if device is unpatched and targeted

Security Implications for Enterprises

CVE-2025-48633 reinforces several critical lessons:

🔐 1. Mobile Devices Are Prime Targets

Mobile devices increasingly store:

Authentication tokens
Corporate credentials
VPN access
MFA secrets

🔗 2. Exploit Chains Are the Norm

Modern attacks rarely rely on a single vulnerability. This flaw likely served as:

Reconnaissance
Exploit enabler
Persistence aid

🕵️ 3. Zero-Days Are No Longer Rare

Android zero-days are now:

Regularly exploited
Highly valuable
Often used in espionage campaigns

Strategic Takeaways

Area	Impact
Severity	High
Exploitability	Local, limited but real
Threat Level	Elevated
Patch Urgency	Immediate
Enterprise Risk	Significant
Attack Use Case	Recon + exploit chaining

Final Summary

CVE-2025-48633 is a high-impact Android information disclosure vulnerability that was actively exploited as a zero-day before being patched by Google. While it does not allow direct remote code execution, its ability to expose sensitive system and account information makes it a powerful tool in advanced attack chains.

The vulnerability underscores a growing trend in mobile exploitation:

Attackers increasingly rely on subtle information leaks to enable larger, more damaging compromises.

Organizations and individuals should ensure that:

Devices are fully patched
Security updates are enforced
Mobile threat detection is in place

Failure to do so leaves systems vulnerable not just to this flaw—but to the next exploit it enables.

February 19, 2026

CVE-2025-48631 — Android Denial-of-Service Vulnerability