CVE-2026-20587 in MT2718
Summary
by MITRE • 10/05/2026
In mtee, there is a possible escalation of privilege due to type confusion. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9608.
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Analysis
by VulDB Data Team • 10/05/2026
The vulnerability identified under issue identifier MSV-9608 and addressed by patch ALPS11383899 resides within the mtee component, which is a critical subsystem responsible for managing Trusted Execution Environments on certain hardware platforms. This specific flaw manifests as a type confusion error, a class of software defects where an object or variable is used in a context that assumes one data type while it actually holds another. In the context of system-level components like mtee, such errors are particularly dangerous because they can bypass standard memory safety checks and allow for arbitrary code execution within highly privileged contexts. The root cause typically involves improper validation of input parameters or incorrect casting during runtime operations, leading to a state where the processor executes instructions based on misinterpreted data structures.
The operational impact of this vulnerability is significant due to its potential for local privilege escalation. Although exploitation requires an attacker to already possess System privileges, which represents a high level of access within most operating systems, achieving such a foothold does not negate the severity of the flaw. Once an actor has obtained System-level access through other means, they can leverage this type confusion to further escalate their rights or manipulate kernel structures in ways that are difficult to detect and mitigate using standard security controls. The absence of user interaction requirements makes automated exploitation feasible for any malicious process running with sufficient privileges, thereby increasing the attack surface significantly within compromised environments.
From a classification perspective, this vulnerability aligns closely with CWE-843, which describes access control issues related to incorrect interpretation of object types or references. It also relates to CWE-120, specifically buffer overflows resulting from improper type handling that can lead to memory corruption. In terms of offensive security frameworks, the exploitation technique falls under MITRE ATT&CK tactic T1068, which covers privilege escalation via exploitation of binary vulnerabilities. The specific sub-technique would involve leveraging a logic error in system software to gain higher-level permissions without requiring additional user input or social engineering tactics.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. Applying the provided patch ALPS11383899 is the primary remediation step, as it likely contains code changes that enforce strict type checking and prevent invalid casts within the mtee subsystem. Beyond patching, developers should implement rigorous static analysis tools configured to detect type confusion patterns during the software development lifecycle. Additionally, enabling memory protection features such as Control Flow Integrity (CFI) can help mitigate the impact of such vulnerabilities by restricting indirect branch targets to valid code locations. Regular security audits focusing on low-level system components are essential to identify similar logic errors before they reach production environments.