Description

An issue was discovered in Samsung Mobile Processor and Wearable Processor Exynos 1330, 1380, 1480, 1580, 1680, W920, W930, and W1000. . A malformed ioctl command to the Wi-Fi interface device can lead to improper buffer size allocation, resulting in an out-of-bounds write and causing a denial of service (DoS).

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "2.8",
  "pubDate": "2026-09-14T02:17:14.547Z",
  "pubdate": "2026-09-14T02:17:14.547Z",
  "executiveSummary": "This vulnerability involves an out-of-bounds write condition within the Wi-Fi interface driver of multiple Samsung Exynos processors, including the 1330, 1380, 1480, 1580, 1680, W920, W930, and W1000.\nThe root cause is identified as improper buffer size allocation triggered by a malformed ioctl command sent to the Wi-Fi driver.\nThe primary security impact is a Denial of Service (DoS), though out-of-bounds write conditions may theoretically allow for memory corruption depending on the precise nature of the overflow and subsequent system state.\nThe vulnerability resides at the kernel or driver level, requiring the attacker to have the ability to interact with the device's Wi-Fi driver interface.\nRisk implications include potential system instability, unexpected crashes, or forced reboots of the affected mobile or wearable hardware.",
  "technicalDetails": "The vulnerability originates from the handling of ioctl (Input/Output Control) requests within the Wi-Fi interface driver component of the Exynos processor firmware/BSP.\nAn attacker can exploit this by crafting a malformed ioctl command. When this command is processed by the driver, the logic responsible for allocating memory buffers fails to calculate the required size correctly, leading to a discrepancy between the allocated buffer and the data being written.\nThe attack flow begins with the delivery of the malicious ioctl request through an interface exposed by the Wi-Fi driver. Because the driver performs insufficient validation on the input parameters provided within the ioctl structure, it proceeds to allocate a buffer that is insufficient for the subsequent data payload.\nDuring the execution of the command handler, the driver performs a write operation based on the user-supplied or incorrectly validated parameters. Due to the improper size allocation, this write operation exceeds the bounds of the destination buffer, resulting in an out-of-bounds write.\nThis out-of-bounds write can overwrite adjacent memory locations within the kernel space, leading to memory corruption. In the context of this specific vulnerability, the primary consequence is a system panic or memory access violation, manifesting as a Denial of Service (DoS) condition.\nBecause the Wi-Fi driver operates with elevated privileges within the kernel environment, this vulnerability allows for kernel-level impact. The exploitation does not necessarily require network exposure if the ioctl interface is accessible from a local context, such as a malicious application running on the device with permissions to communicate with the Wi-Fi driver.\nPost-exploitation behavior is characterized by kernel instability. While the primary impact is DoS, out-of-bounds writes in kernel memory often serve as primitives for more complex exploits, such as local privilege escalation, if the memory layout can be predictably manipulated to overwrite critical data structures, function pointers, or objects."
}