CVE-2026-56950 in Android
Summary
by MITRE • 09/15/2026
In validate_ns_buf of mbu_class.rs, there is a possible information disclosure due to improper input validation. This could lead to local information disclosure with System 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 validate_ns_buf function within the mbu_class.rs module represents a critical flaw rooted in insufficient input validation mechanisms. As a cyber security specialist, it is evident that this defect allows an attacker to exploit improper handling of namespace buffer inputs, leading directly to local information disclosure. The core technical issue lies in the failure to adequately sanitize or verify the boundaries and content of data passed into the function before processing. This lack of rigorous checks creates a scenario where sensitive memory contents can be read beyond their intended scope, exposing internal system states or private data that should remain isolated from unauthorized access.
From an operational perspective, this vulnerability enables local information disclosure with System execution privileges required for exploitation. This implies that while the attacker must already have achieved a foothold on the target system and obtained high-level permissions, the ease of exploitation is significantly heightened because user interaction is not needed. The absence of a requirement for user engagement means that once an adversary gains initial access through any other vector, such as phishing or exploiting another service, they can automatically trigger this flaw to extract sensitive information without further social engineering efforts. This characteristic makes it particularly dangerous in environments where privilege escalation has already occurred but lateral movement and data exfiltration are the next objectives.
The technical implications of this flaw align closely with CWE-200, which categorizes exposures of information that could aid an attacker in planning subsequent attacks. By leaking internal system details, such as memory layouts or configuration parameters, the vulnerability provides valuable intelligence for crafting more sophisticated exploits against other components within the same environment. Furthermore, from a tactical standpoint, this behavior maps to techniques observed in the MITRE ATT&CK framework under Information Collection and potentially Command and Scripting Interpreter if the disclosed information facilitates further script execution. The ability to read arbitrary memory regions can also hint at underlying issues related to CWE-125, Out-of-bounds Read, suggesting that buffer boundary checks are either missing or incorrectly implemented in the validation logic of mbu_class.rs.
Mitigation strategies must focus on hardening the input validation processes within the affected module. Developers should implement strict bounds checking for all namespace buffers before they are processed by validate_ns_buf. This includes verifying length constraints and ensuring that data types match expected formats to prevent overflow or underflow conditions. Additionally, adopting secure coding practices such as using safe string handling libraries can reduce the risk of memory corruption vulnerabilities. Regular code audits focusing on input validation logic in Rust modules are essential to identify similar patterns across the codebase. For immediate remediation, applying vendor-provided patches that address this specific flaw is critical, followed by comprehensive testing to ensure no regression occurs and that all edge cases for buffer handling are covered.