CVE-2026-28594 in Android
Summary
by MITRE • 09/08/2026
In multiple locations, there is a possible use after free due to a logic error in the code. This could lead to local 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 • 09/09/2026
The identified vulnerability represents a critical memory safety issue classified as a Use-After-Free condition, stemming from a fundamental logic error within the application's resource management routines. In software development, particularly in systems programming languages like C or C++, a use-after-free occurs when a program continues to use a pointer after the memory it points to has been released back to the operating system. This specific instance is not caused by an obvious buffer overflow but rather by flawed control flow logic that fails to properly invalidate pointers or update state variables immediately following deallocation. Consequently, subsequent operations may inadvertently access this dangling reference, leading to undefined behavior that can be exploited by malicious actors. The presence of multiple locations where this flaw exists significantly increases the attack surface and reduces the complexity required for successful exploitation across different execution paths within the software stack.
From a security impact perspective, this vulnerability facilitates local privilege escalation without requiring additional execution privileges or user interaction. This characteristic makes it particularly dangerous in multi-user environments or systems with untrusted input vectors. An attacker who gains access to the system, even at a low-privilege level such as that of a standard guest account, can leverage this logic error to manipulate memory structures and execute arbitrary code within the context of a higher-privileged process. The absence of user interaction means that exploitation does not rely on social engineering tactics or specific user actions like clicking malicious links, allowing for automated attacks via scripts or worm-like propagation mechanisms if network-accessible services are involved. This aligns with common attack patterns observed in real-world scenarios where attackers seek to move laterally within a network by compromising local accounts and escalating privileges to gain administrative control over critical infrastructure components.
The technical nature of this flaw maps directly to the Common Weakness Enumeration identifier CWE-416, which defines use-after-free vulnerabilities as a subset of improper memory handling issues. Furthermore, in terms of tactical execution, this vulnerability supports techniques associated with MITRE ATT&CK framework categories such as Privilege Escalation via Exploitation of Local Vulnerabilities (Tactic TA0004). Attackers typically exploit these conditions by crafting specific inputs that trigger the premature deallocation of memory objects while maintaining references to them. By carefully controlling heap layout or stack contents, an attacker can overwrite adjacent data structures with malicious payloads, thereby hijacking control flow and achieving code execution. The logic error implies that standard input validation may be insufficient; instead, the core issue lies in the lifecycle management of dynamic memory allocations, requiring developers to review pointer invalidation practices and reference counting mechanisms rather than just sanitizing external inputs.
Mitigation strategies for this vulnerability require a comprehensive audit of all memory allocation and deallocation sites within the affected codebase. Developers must ensure that pointers are explicitly set to null immediately after free operations to prevent accidental dereferencing, although this alone is not sufficient if other references exist. Implementing robust reference counting mechanisms or utilizing smart pointer abstractions can help manage object lifecycles more safely in complex applications. Additionally, adopting static analysis tools and dynamic memory checkers such as AddressSanitizer during the development phase can identify these logic errors before deployment. For immediate remediation, applying vendor-provided patches is essential, as they typically include fixes that correct the underlying state management logic. Organizations should also enforce strict least-privilege principles to limit the potential impact of any successful exploitation, ensuring that even if an attacker achieves local access, their ability to escalate privileges remains constrained by system hardening measures and mandatory access controls where applicable.