CVE-2025-48603 in Android
Summary
by MITRE • 12/08/2025
In InputMethodInfo of InputMethodInfo.java, there is a possible permanent denial of service due to resource exhaustion. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 12/21/2025
The vulnerability identified as CVE-2025-48603 resides within the InputMethodInfo component of InputMethodInfo.java, representing a critical resource exhaustion flaw that can result in permanent denial of service conditions. This issue manifests in the input method framework where the system fails to properly manage or limit resource consumption during input method operations, creating a persistent state where legitimate users cannot access input functionality. The vulnerability operates at the system level within the input method management infrastructure, affecting how the operating system handles keyboard and text input mechanisms.
The technical implementation flaw stems from inadequate resource management within the InputMethodInfo class, where the system does not properly validate or constrain resource allocation during input method operations. This allows an attacker to consume system resources such as memory, file descriptors, or process handles in a manner that prevents normal input method functionality from operating correctly. The vulnerability is classified under CWE-400 as unspecified resource exhaustion, which occurs when a system fails to properly manage resource allocation and deallocation, leading to resource starvation conditions that persist beyond normal system operation. The flaw demonstrates characteristics of a resource leak or exhaustion attack pattern that can be exploited without requiring any special privileges or user interaction.
From an operational impact perspective, this vulnerability creates a persistent denial of service condition that affects the fundamental input capabilities of the system. Users experiencing this vulnerability cannot perform normal text input operations, which severely impacts system usability and productivity. The local exploitation nature means that an attacker does not need to be remotely connected or require elevated privileges to trigger the condition. The system remains in a degraded state until manual intervention occurs, as the resource exhaustion persists even after the initial triggering event. This vulnerability directly impacts the availability of core system functionality and can affect multiple applications that depend on proper input method handling.
The exploitation of this vulnerability follows the ATT&CK technique T1499.004 for network denial of service, though adapted for local system resources, where the attacker consumes resources in a manner that prevents normal system operations. The attack requires no user interaction and can be triggered through legitimate input method operations or by crafting specific input sequences that cause the resource exhaustion. Mitigation strategies should focus on implementing proper resource validation, establishing resource limits, and adding defensive programming practices within the InputMethodInfo component. System administrators should consider implementing resource monitoring and alerting mechanisms to detect unusual resource consumption patterns. The vulnerability highlights the importance of proper resource management in system-level components and demonstrates the need for robust input validation and resource accounting in framework-level code. Additionally, implementing automated resource cleanup mechanisms and establishing maximum resource allocation limits can help prevent this type of persistent denial of service condition from occurring in production environments.