CVE-2026-55332 in Android
Summary
by MITRE • 09/15/2026
In multiple locations, there is a possible out-of-bounds write due to improper input validation. This could lead to local escalation of privilege 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 described represents a critical security flaw characterized by an out-of-bounds write resulting from insufficient input validation within the affected software component. Out-of-bounds writes are among the most dangerous memory corruption vulnerabilities because they allow an attacker to overwrite adjacent memory locations that may contain sensitive data, control flow pointers, or other program state information. In this specific instance, the improper handling of user-supplied or system-generated inputs leads to a scenario where write operations exceed the boundaries of allocated buffers. This type of flaw is typically classified under CWE-787, which denotes out-of-bounds write vulnerabilities, and often intersects with CWE-120 for buffer overflows when heap or stack memory structures are involved. The root cause lies in the failure to rigorously validate input lengths against expected buffer capacities before performing copy operations, a fundamental principle of secure coding that is frequently overlooked during rapid development cycles.
The operational impact of this vulnerability is severe due to its potential for local privilege escalation with system execution privileges. When an attacker successfully exploits an out-of-bounds write in a privileged context or within a process running with elevated rights, they can manipulate memory structures such as function pointers, return addresses, or object vtables. By carefully crafting the malicious input, the attacker can redirect program execution to arbitrary code of their choosing. Since the exploitation does not require user interaction, the attack vector is fully remote in terms of automation but local in terms of access requirements, meaning an adversary must already have some level of foothold on the system or be able to trigger the vulnerable function through automated means such as network requests if exposed via a service interface. This aligns with ATT&CK technique T1068 Exploitation for Privilege Escalation and potentially T1203 Exploitation for Client Execution depending on how the initial access is gained, though the core mechanism here focuses on the privilege escalation aspect once inside the system boundary.
From a technical perspective, out-of-bounds writes can lead to various outcomes including application crashes leading to denial of service, data corruption causing instability, or full code execution if the memory layout allows for control flow hijacking. In modern operating systems with mitigations like Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP), exploiting such vulnerabilities requires additional techniques such as information disclosure leaks to bypass ASLR or return-oriented programming chains to circumvent DEP. However, given that system-level privileges are achievable, the attacker gains complete control over the affected machine. This level of access allows for further lateral movement within a network, persistence through backdoors or scheduled tasks, and exfiltration of sensitive data stored on the local filesystem. The absence of user interaction significantly lowers the barrier to entry for attackers, enabling automated scanning tools and worm-like propagation mechanisms to exploit this flaw across multiple hosts without manual intervention.
Mitigation strategies must address both immediate remediation and long-term defensive posture improvements. The primary solution is to apply vendor-provided patches or updates that correct the input validation logic within the affected component. Developers should implement strict bounds checking before any memory write operation, ensuring that indices are validated against buffer sizes using safe programming practices such as those outlined in CERT C Secure Coding Standard guidelines for array indexing and pointer arithmetic. Additionally, employing static application security testing tools during development can help identify similar patterns of improper input validation early in the software lifecycle. For deployed systems where patching is not immediately feasible, network segmentation should be enforced to limit access to vulnerable services, and host-based intrusion detection systems should be configured to monitor for anomalous memory access patterns or privilege escalation attempts associated with this specific vulnerability signature. Regular security audits focusing on memory safety and input validation completeness are essential to prevent recurrence of such critical flaws in future software releases.