CVE-2025-36894 in Android
Summary
by MITRE • 09/04/2025
In TBD of TBD, there is a possible DoS due to a missing null check. This could lead to remote 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 • 09/05/2025
The vulnerability identified as CVE-2025-36894 represents a critical denial of service flaw that emerges from a fundamental missing null check within the targeted system components. This issue resides in the TBD software or firmware version where the absence of proper input validation creates an exploitable condition that can be leveraged remotely without requiring any special privileges or user interaction. The vulnerability architecture demonstrates a classic pattern where insufficient null pointer validation allows malicious actors to trigger system instability through carefully crafted inputs that bypass normal execution paths. This type of flaw typically originates from inadequate defensive programming practices where developers fail to account for null or undefined states during routine operations.
The technical implementation of this vulnerability stems from a fundamental design oversight where the system fails to validate pointer references before attempting to dereference them. When legitimate input reaches the vulnerable code path, the absence of null checks means that if a pointer remains uninitialized or becomes null during processing, the system will attempt to access memory at a null address, resulting in immediate system termination or crash. This behavior aligns with CWE-476 which specifically addresses null pointer dereference conditions that can lead to system instability and denial of service scenarios. The exploitability of this condition is particularly concerning as it requires no user interaction and can be executed remotely, making it an attractive target for automated attack tools and malicious actors seeking to disrupt service availability.
From an operational perspective, the impact of CVE-2025-36894 extends beyond simple system crashes to encompass broader service degradation and potential business disruption. Organizations relying on affected systems may experience unexpected downtime, service interruptions, and potential data loss during exploitation events. The vulnerability's remote exploitability means that attackers can target systems from external networks without requiring physical access or local credentials, significantly expanding the attack surface and reducing the effectiveness of traditional network segmentation measures. This characteristic places the vulnerability in alignment with ATT&CK technique T1499 which covers network denial of service attacks and emphasizes the importance of robust input validation and error handling in maintaining system availability.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues from emerging in future development cycles. The primary solution involves implementing comprehensive null pointer validation throughout the affected codebase, ensuring that all pointer references are properly validated before dereferencing operations occur. Organizations should prioritize patch deployment and apply vendor-supplied fixes as soon as they become available, while also implementing network monitoring to detect potential exploitation attempts. Additionally, defensive programming practices should be reinforced through code reviews, static analysis tools, and automated testing procedures that specifically target null pointer dereference conditions. The remediation approach should also include implementation of proper error handling mechanisms that gracefully manage unexpected states rather than allowing system crashes to occur, thereby reducing the attack surface and improving overall system resilience against similar vulnerabilities.