CVE-2026-56892 in Android
Summary
by MITRE • 09/15/2026
In ReadDataElement of common.c, there is a possible information disclosure due to an incorrect bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability identified in the ReadDataElement function within common.c represents a classic instance of improper input validation leading to out-of-bounds memory access. Specifically, an incorrect bounds check allows an application to read from or write to memory locations outside the intended buffer boundaries. This flaw typically arises when array indices are not properly validated against the allocated size before being used for data retrieval operations. In this context, the function fails to verify that the requested index is within the valid range of the underlying data structure, thereby permitting access to adjacent memory regions that contain sensitive information unrelated to the current operation.
From a technical perspective, this defect aligns with CWE-125, which describes Out-of-bounds Read vulnerabilities. When an application reads beyond its allocated buffer, it may inadvertently expose contents from neighboring stack frames, heap allocations, or global variables. These adjacent memory regions often hold critical security data such as authentication tokens, cryptographic keys, session identifiers, or other user-specific information. Because the vulnerability resides in a commonly used utility function, it can be triggered by various components within the software ecosystem that rely on this module for data processing, increasing the attack surface significantly without requiring specialized knowledge of internal architecture details beyond basic API usage patterns.
The operational impact of this flaw is severe due to its potential for local information disclosure. An attacker who gains access to the affected system can exploit this weakness to extract sensitive data from memory space that should remain isolated and protected. Since no additional execution privileges are required, even low-privileged users or compromised processes with minimal permissions can leverage this vulnerability. Furthermore, the fact that user interaction is not needed for exploitation means that automated tools could potentially discover and trigger this flaw during routine operations or background tasks, making it a persistent risk rather than an isolated incident dependent on social engineering or specific user actions.
This scenario maps directly to several techniques within the MITRE ATT&CK framework, particularly T1005, which covers Data from Local System. The ability to read arbitrary memory locations facilitates data staging and exfiltration phases of an attack chain. By leaking internal state information, attackers can gain insights into system configuration, running processes, or active sessions, which aids in lateral movement and privilege escalation efforts later in the kill chain. The lack of requirement for user interaction further classifies this as a high-severity issue because it removes barriers to entry that might otherwise slow down automated exploitation attempts by malicious actors scanning for weaknesses.
Mitigation strategies must focus on rigorous input validation and memory safety practices. Developers should implement strict boundary checks before any array or buffer access occurs, ensuring that indices are validated against the maximum allowable size of the data structure. Utilizing static analysis tools capable of detecting out-of-bounds reads can help identify such flaws during the development phase rather than in production environments. Additionally, adopting safer programming languages or libraries with built-in bounds checking mechanisms can reduce the likelihood of similar errors occurring elsewhere in the codebase. For systems where this vulnerability exists, applying vendor-provided patches that correct the logic within ReadDataElement is essential to restore security integrity and prevent unauthorized data exposure.