CVE-2026-58856 in Android
Summary
by MITRE • 10/05/2026
In returnOutputBufferLocked of DeprecatedCamera3StreamSplitter.cpp, there is a possible out-of-bounds read due to a missing 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 • 10/05/2026
The vulnerability identified in the returnOutputBufferLocked function within DeprecatedCamera3StreamSplitter.cpp represents a critical memory safety flaw characterized by an out-of-bounds read condition. This defect arises from a missing bounds check during the processing of camera stream buffers, allowing the application to access memory locations that lie outside the intended allocation boundaries. In systems utilizing C or C++, such as Android's native layer where this code resides, array indexing and buffer management rely heavily on explicit validation by the developer. When these checks are omitted, particularly in high-throughput subsystems like camera pipelines, the runtime environment may read arbitrary memory contents based on index calculations that exceed valid limits. This specific flaw falls under the Common Weakness Enumeration category CWE-125, which defines out-of-bounds read vulnerabilities where software reads data past the end or before the beginning of a buffer without proper validation.
The operational impact of this vulnerability centers on local information disclosure with minimal prerequisites for exploitation. Because the function is part of the camera subsystem, it processes sensitive visual and sensor data streams that are frequently accessed by various applications and system services. An attacker who can trigger this code path does not require elevated privileges or user interaction to exploit the flaw. This low barrier to entry significantly increases the risk surface, as any application with access to the camera hardware interface could potentially induce the erroneous memory read. The consequence is the leakage of sensitive information stored in adjacent memory regions, which may include cryptographic keys, authentication tokens, private user data from other applications, or kernel-level secrets depending on the specific layout of the process address space at the time of exploitation.
From a threat modeling perspective aligned with MITRE ATT&CK frameworks, this vulnerability facilitates initial access and credential harvesting techniques often categorized under Tactic TA0006 for Credential Access or TA0010 for Discovery. Specifically, it aligns with patterns associated with memory scraping or side-channel information leakage where an adversary extracts sensitive data from the target's runtime environment without direct execution privileges on those specific targets. The absence of user interaction and privilege escalation requirements classifies this as a high-severity issue within mobile operating systems, potentially enabling persistent surveillance capabilities if combined with other vulnerabilities in the camera stack.
Mitigation strategies must focus on rigorous input validation and memory safety enforcement at the source code level. Developers should implement strict boundary checks before any array indexing or buffer access operations occur within returnOutputBufferLocked. This includes verifying that stream identifiers, frame counts, and buffer indices remain within predefined limits established during initialization. Additionally, adopting modern C++ practices such as using std::vector with its built-in bounds checking methods like at() instead of raw pointers can prevent many此类 errors automatically. Static analysis tools configured to detect CWE-125 patterns should be integrated into the continuous integration pipeline to catch missing validations early in development. For deployed systems, enabling hardware-enforced memory protection features such as ARM Memory Tagging Extension or Android's AddressSanitizer during testing phases helps identify these flaws before they reach production environments.