CVE-2026-58835 in Android
Summary
by MITRE • 10/05/2026
In cfg2prop of btif_storage.cc, there is a possible out-of-bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified in the cfg2prop function within the btif_storage.cc module represents a critical security flaw characterized by an out-of-bounds write resulting from a heap buffer overflow. This specific type of memory corruption occurs when data written to a dynamically allocated region on the heap exceeds its designated boundaries, overwriting adjacent memory structures that are not intended for modification. In the context of Bluetooth interface storage management, this function is responsible for translating configuration parameters into property values, and an error in boundary checking or size calculation during this translation process allows maliciously crafted input data to spill beyond the allocated buffer limits. The presence of such a flaw indicates insufficient validation of input lengths relative to the target buffer capacity, creating a pathway for attackers to manipulate memory contents arbitrarily.
The operational impact of this vulnerability is severe due to its potential for remote code execution without requiring additional privileges or user interaction. Because heap overflows can overwrite critical data structures such as function pointers, exception handlers, or object metadata located in adjacent memory regions, an attacker can control the flow of program execution by redirecting it to malicious shellcode injected into the process space. The absence of a requirement for user interaction significantly lowers the barrier to exploitation, allowing automated attacks that do not rely on social engineering tactics like clicking links or opening files. Furthermore, the lack of privilege escalation requirements means that even if the vulnerable service runs with limited permissions, successful exploitation can still lead to full compromise of the underlying system depending on how the affected process interacts with other components and operating system resources.
From a technical classification perspective, this issue aligns closely with CWE-120, which describes buffer copy without checking size limits, specifically manifesting as an out-of-bounds write in heap memory. This category highlights failures in input validation where the application does not ensure that data fits within the preallocated space before performing write operations. In terms of offensive security frameworks such as MITRE ATT&CK, this vulnerability facilitates techniques associated with initial access and execution phases, particularly those involving exploitation for remote code execution via buffer overflows. Attackers leveraging this flaw would likely employ memory corruption techniques to bypass standard control flow integrity mechanisms, potentially exploiting weaknesses in heap management algorithms or using advanced spraying methods to increase the probability of successful redirection.
Mitigation strategies must focus on rigorous input validation and robust memory safety practices within the source code responsible for handling Bluetooth configuration data. Developers should implement strict bounds checking before any write operations occur, ensuring that the length of incoming configuration parameters is validated against the size of the destination buffer allocated by btif_storage.cc. Utilizing modern programming languages or libraries with built-in memory safety features can help prevent such overflows at compile time rather than relying solely on runtime checks. Additionally, enabling compiler-level protections such as stack canaries, Address Space Layout Randomization (ASLR), and Data Execution Prevention (DEP) provides essential layers of defense that make exploitation more difficult by randomizing memory layouts and preventing the execution of injected code in writable memory regions. Regular static analysis and fuzzing tests targeting the cfg2prop function are recommended to identify similar edge cases before deployment, ensuring that future updates do not reintroduce comparable vulnerabilities through inadequate boundary verification logic.