CVE-2026-20574 in MT2735
Summary
by MITRE • 11/02/2026
In afe, there is a possible memory corruption due to use after free. 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: ALPS11431400; Issue ID: MSV-9922.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified under patch identifier ALPS11431400 and issue number MSV-9922 represents a critical memory safety flaw within the Android Framework Environment, specifically categorized as a use-after-free condition. This type of defect occurs when an application or system component continues to reference a block of memory after it has been freed by the operating system's memory manager. In the context of modern mobile operating systems like Android, which rely heavily on complex object lifecycles and asynchronous processing, such errors can arise from race conditions where pointers are not properly nullified or validated before being dereferenced again. The root cause typically involves a failure to synchronize access to shared resources, allowing an attacker to manipulate the timing of memory deallocation relative to subsequent read or write operations. This architectural weakness undermines the fundamental isolation guarantees provided by the kernel and runtime environment, creating a pathway for arbitrary code execution if exploited successfully.
From a technical perspective, use-after-free vulnerabilities are particularly dangerous because they allow attackers to control what data is written into freed memory regions. By carefully crafting malicious inputs that trigger the premature release of an object while maintaining a reference to it, an attacker can overwrite adjacent heap structures or inject shellcode into reclaimed memory space. When the system subsequently attempts to access this corrupted pointer, it may execute arbitrary instructions with the privileges associated with the affected process. In the case of Android Framework components, these processes often run at elevated privilege levels compared to standard user applications. Consequently, successful exploitation does not merely result in data leakage or denial of service but facilitates a direct transition from unprivileged code execution to full system control. This aligns directly with Common Weakness Enumeration identifier CWE-416, which describes the specific scenario where dereferencing freed memory leads to undefined behavior and potential security breaches.
The operational impact of this vulnerability is severe due to its potential for local privilege escalation. Although the description notes that a malicious actor must already possess System privileges or equivalent high-level access to initiate exploitation attempts, the existence of such an entry point significantly lowers the barrier for further compromise within isolated sandboxed environments. If an attacker can leverage this flaw to escape the confines of their current execution context, they may gain unrestricted read and write access to sensitive system partitions, intercept encrypted communications, bypass security controls like SELinux policies, or install persistent backdoors that survive device reboots. The fact that user interaction is not required for exploitation further exacerbates the risk profile, as it enables passive attacks where background processes can trigger the vulnerability without any visible action from the end-user. This characteristic maps closely to ATT&CK technique T1055, which covers process injection and memory manipulation techniques used by adversaries to maintain persistence or escalate privileges on compromised systems.
Mitigation strategies for this class of vulnerabilities primarily rely on timely software updates provided by device manufacturers and chipmakers like MediaTek, as indicated by the ALPS patch identifier. Organizations managing Android-based infrastructure should prioritize deploying patches that address MSV-9922 across all affected devices to close the memory management gap in the framework layer. Beyond immediate patching, defense-in-depth measures are essential to mitigate residual risks associated with similar flaws. Implementing robust runtime application self-protection mechanisms can help detect anomalous memory access patterns indicative of exploitation attempts. Additionally, enforcing strict sandboxing policies and minimizing the attack surface by disabling unnecessary services reduces the likelihood that an attacker will find a viable path to trigger this specific use-after-free condition. Continuous monitoring for unusual system behavior or unauthorized privilege changes remains critical in detecting potential abuse of such vulnerabilities before they lead to full system compromise.