Description

Out-of-bounds Write and Improper Validation of Array Index vulnerability in Samsung Open Source TizenFX Samsung/TizenFX allows Overflow Buffers.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.3",
  "pubDate": "2026-09-03T13:06:20.143Z",
  "pubdate": "2026-09-03T13:06:20.143Z",
  "executiveSummary": "The Samsung TizenFX framework contains a critical vulnerability characterized by an Out-of-bounds (OOB) Write, stemming from improper validation of array indices.\nThis flaw resides within the framework's internal memory handling routines, potentially allowing an attacker to overwrite adjacent memory segments.\nThe vulnerability affects the TizenFX product, exposing systems to potential memory corruption.\nSuccessful exploitation could lead to arbitrary code execution, unauthorized data modification, or a complete denial-of-service (DoS) condition of the application process.\nThe security impact is severe, as it enables an attacker to manipulate the program's execution flow by corrupting data structures or function pointers residing in memory.\nExploitation typically requires the attacker to influence input that is subsequently used as an index into an array without adequate bounds checking.\nGiven the nature of TizenFX, this vulnerability may be triggered via local interfaces or application-specific attack vectors depending on the implementation context.",
  "technicalDetails": "The vulnerability is rooted in the absence of rigorous bounds checking when processing array indices within TizenFX. An Out-of-bounds Write occurs when software performs a write operation at an address that is outside the intended buffer boundaries.\nIn TizenFX, when an array index is supplied by an untrusted source or processed without sufficient validation, the application may compute a target memory address that lies outside the allocated buffer. When the write operation is executed, the application corrupts the adjacent memory contents.\nThe attack flow commences when a malformed input is passed to a vulnerable component in TizenFX. If the input is utilized as an index for an array access without validating that the index is within the defined array dimensions, the application proceeds to perform a write operation relative to the array's base address.\nBecause the calculated offset is unconstrained, the pointer arithmetic can point to memory locations containing sensitive data, control structures, or function pointers.\nThe exploitation method involves manipulating the input to overwrite specific memory regions, such as return addresses on the stack or virtual method tables (vtable) if the object context allows. By overwriting a control structure, an attacker can hijack the program execution flow, redirecting it to attacker-controlled instructions (e.g., shellcode) or existing code gadgets in a return-oriented programming (ROP) chain.\nThis type of memory corruption vulnerability does not inherently require authentication if the affected function is reachable through public APIs or accessible interfaces within the Tizen environment. The impact is significant, as it can be leveraged to bypass security controls or achieve persistent compromise of the host process, potentially leading to unauthorized escalation of privileges within the security context of the Tizen application.\nThe vulnerability highlights a failure in input validation logic where the framework assumes that the provided index value is always within the expected operational bounds, failing to account for potentially malicious or extreme integer values."
}