CVE-2026-55280 in Android
Summary
by MITRE • 10/05/2026
In multiple locations, there is a possible out-of-bounds write due to uninitialized data. This could lead to remote escalation of privilege 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 described constitutes a critical security flaw characterized by an out-of-bounds write resulting from the use of uninitialized memory data within the application logic. In software engineering, when variables or buffers are allocated but not properly initialized before being used in operations that modify system state or memory structures, they may contain residual data from previous allocations. This garbage value can dictate invalid memory addresses or incorrect array indices during execution. When such a flaw leads to an out-of-bounds write, the application attempts to write data to a memory location outside the intended boundaries of the allocated buffer. This action corrupts adjacent memory regions, potentially overwriting critical control structures, function pointers, or security metadata that govern program flow and access controls.
From a technical perspective, this flaw aligns with Common Weakness Enumeration (CWE) identifiers such as CWE-94 Improper Control of Generation of Code Command Injection if the uninitialized data influences code execution paths, but more accurately maps to CWE-120 Buffer Overflow without null termination or CWE-787 Out-of-bounds Write. The core issue lies in the failure of the developer to ensure that all memory regions are zeroed out or explicitly assigned valid values before being utilized for write operations. This lack of initialization creates a deterministic yet unpredictable vector where an attacker can manipulate the uninitialized data, either by influencing prior allocation patterns or through specific input sequences that trigger the flawed code path without proper validation checks.
The operational impact of this vulnerability is severe due to its potential for remote escalation of privilege with no additional execution privileges required and no user interaction needed. This classification indicates a high-severity flaw where an unauthenticated, remote attacker can exploit the memory corruption to gain elevated access rights on the affected system. By carefully crafting payloads that leverage the uninitialized data to overwrite specific memory locations, such as return addresses or exception handling structures, an attacker can achieve arbitrary code execution. Once arbitrary code execution is established within the context of a privileged process, the attacker can escalate privileges to administrative levels, effectively taking full control of the compromised host. This capability allows for complete system compromise, including data exfiltration, installation of persistent backdoors, and lateral movement across networked environments.
This vulnerability also maps directly to MITRE ATT&CK techniques related to privilege escalation and remote code execution. Specifically, it relates to T1068 Exploitation for Privilege Escalation and potentially T1203 Exploitation for Client Execution if the initial vector involves client-side components. The absence of user interaction significantly increases the attack surface, as traditional social engineering defenses are rendered ineffective. Attackers can automate exploitation using scripts that probe for this specific memory corruption pattern over network protocols, making it a prime target for automated worm-like propagation or targeted attacks against services exposed to untrusted networks.
Mitigation strategies must focus on both immediate remediation and long-term defensive coding practices. The primary fix involves ensuring rigorous initialization of all variables and buffers before they are used in any operation that affects memory layout or control flow. Developers should employ static analysis tools configured to detect uninitialized variable usage, such as those compliant with CERT C Secure Coding Standards which emphasize the importance of initializing storage classes like auto variables. Additionally, implementing compiler-based protections can help mitigate exploitation even if the vulnerability persists temporarily. Enabling Address Sanitizers during testing phases allows for early detection of out-of-bounds writes and use-after-free errors. For production environments, deploying Memory Safety features such as Stack Canaries, Data Execution Prevention (DEP), and Address Space Layout Randomization (ASLR) can significantly raise the barrier for successful exploitation by making it difficult to predict memory layouts and preventing execution from data segments. Regular security audits focusing on memory management practices are essential to prevent recurrence of this class of vulnerabilities.