Description

In multiple functions of MessageQueueBase.h, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-10-05T19:17:21.103Z",
  "pubdate": "2026-10-05T19:17:21.103Z",
  "executiveSummary": "A critical out-of-bounds read vulnerability has been identified within multiple functions of MessageQueueBase.h. The flaw stems from improper validation of input parameters used to define index offsets within the message queue structure.\nThis vulnerability allows an unprivileged local attacker to read memory contents outside the intended buffer boundaries. By manipulating input values passed to the affected functions, an attacker can induce the system to perform unauthorized memory reads, potentially leading to the disclosure of sensitive information such as cryptographic keys, memory pointers, or internal system state.\nThe vulnerability does not require user interaction or elevated privileges for successful exploitation. Because the flaw facilitates information leakage, it presents a significant risk to local system integrity and confidentiality. If leveraged successfully, this vulnerability could serve as a prerequisite for more complex exploit chains, such as bypassing Address Space Layout Randomization (ASLR) or other memory protection mechanisms, ultimately facilitating local escalation of privilege.\nThe scope of impact is limited to the local system environment, but the lack of authentication or user interaction requirements makes it a high-risk vector for malicious local actors or compromised low-privilege processes.",
  "technicalDetails": "The root cause of this vulnerability lies in the insufficient bounds checking performed during index-based access operations within MessageQueueBase.h. The affected functions retrieve or process queue entries using offsets derived from external inputs without verifying that these inputs remain within the allocated memory bounds of the message queue buffer.\nExploitation occurs when an attacker triggers the execution of these functions with malformed or intentionally crafted parameters. Specifically, if an attacker provides an index value that exceeds the defined buffer size, the internal pointer arithmetic in MessageQueueBase.h does not prevent access to adjacent memory regions. This violates memory safety boundaries and enables an out-of-bounds (OOB) read condition.\nThe attack flow follows a predictable sequence: First, the attacker identifies a process or system service that utilizes the vulnerable MessageQueueBase.h interface. Second, the attacker interacts with the messaging mechanism to submit a request containing an out-of-range index. Third, the kernel or service-level process fails to validate the index against the current buffer length. Finally, the service performs a read operation at an address derived from the invalid index, causing the application to return data from memory adjacent to the queue buffer.\nBecause the memory read is performed by the service context, the attacker can systematically read unauthorized segments of the process's address space. This primitive is powerful for an attacker looking to leak sensitive data structures. In scenarios where the MessageQueueBase is used for inter-process communication (IPC), the attacker may be able to extract data belonging to other processes or the privileged service itself. This information disclosure is particularly dangerous if it reveals memory pointers, which can then be used to calculate base addresses for ROP chains or other sophisticated exploitation techniques aimed at achieving arbitrary code execution or local privilege escalation.\nThe vulnerability is confined to the local attack surface, as it requires the attacker to be present on the host system to interact with the vulnerable message queue functions. No network-level exploitation is feasible for this specific flaw unless combined with other remote vulnerabilities. The lack of strict parameter sanitization at the function entry point allows for high-reliability exploitation, as the system does not crash immediately upon reading, provided the memory address is mapped within the process space."
}