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How the CVE Works
The vulnerability resides within the `NotificationManagerService.java` file in Android’s framework. This service manages notifications and enforces a per-application limit on the number of notification channels an app can create, a safeguard against resource exhaustion. The flaw exists because multiple specific functions within this service contain logic that can be manipulated to bypass these established limits. A malicious application installed on the device, requiring no special permissions (PR:L) or user interaction (UI:N), can exploit this flaw. By repeatedly calling the vulnerable functions, the app can create an excessive number of notification channels, far beyond the intended system quota. This leads to the uncontrolled consumption of kernel memory and system resources. The result is a local denial-of-service (DoS) condition, potentially causing severe system instability, performance degradation, or rendering the device unresponsive, all without crashing the exploiting app itself. The attack complexity is low (AC:L), as it directly exploits the API logic flaw.
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Platform: Android (Google)
Version: 16
Vulnerability: Local Denial of Service
Severity: High
Date: 2025-12-08
Prediction: 2025-12-05 Patch
What Undercode Say:
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Check device patch level: `getprop ro.build.version.security_patch`
Monitor system logs for `NotificationService` resource errors.
Verify AOSP commit `08a0766708db2071d9b8b65abf40d7e8057daaa1` is applied.
How Exploit:
Vector: Local, low complexity.
Method: Bypass channel limit checks.
Privilege: Requires installed app.
Interaction: None needed.
Protection from this CVE
Apply December 2025 patches.
Update to security patch level 2025-12-05.
Restrict unknown source apps.
Impact:
System resource exhaustion.
Local device instability.
No data compromise.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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