Description

Heap-based buffer overflow in Windows Storage Port Driver allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:19:00.973Z",
  "pubdate": "2026-08-11T17:19:00.973Z",
  "executiveSummary": "This vulnerability is a heap-based buffer overflow affecting the Windows Storage Port Driver. The flaw resides within memory management routines handling storage I/O control operations.\nSuccessful exploitation of this security issue allows an authorized local attacker to elevate privileges on the target operating system.\nThe affected product is the Windows Storage Port Driver, a core component of the Windows storage subsystem.\nThe risk implications are severe, as local privilege escalation typically leads to full system compromise, enabling attackers to execute arbitrary code in kernel mode or acquire administrative privileges.\nAttacker capabilities require local access to the system with authorization to interact with the vulnerable driver, though specific exploitation requirements may involve crafting specialized input to trigger the heap corruption.\nThe vulnerability poses significant risks to multi-user environments and endpoints where internal actors or restricted user accounts might attempt unauthorized privilege escalation.",
  "technicalDetails": "The vulnerability is classified as a heap-based buffer overflow stemming from improper bounds checking within the Windows Storage Port Driver.\nThe vulnerable component is responsible for processing storage-related input/output control requests and managing memory allocation structures within the kernel heap.\nThe root cause involves inadequate validation of size parameters supplied by user-mode callers before initiating memory copy operations into heap-allocated buffers.\nAuthentication requirements dictate that the attacker must possess local execution capability on the target machine.\nPrivilege requirements specify that the attacker must be an authorized user, though operating with low or standard privileges prior to exploitation.\nNetwork exposure is non-existent, as the vulnerability requires local interaction with the driver interface.\nThe attack flow proceeds as follows: First, the local attacker obtains a handle to the Windows Storage Port Driver interface. Second, the attacker formulates a malicious payload containing specially crafted I/O control requests with manipulated size parameters designed to exceed the bounds of the allocated heap chunk. Third, the driver passes this untrusted input to internal memory copy routines without sufficient length validation. Fourth, the oversized data overflows the heap buffer, corrupting adjacent heap metadata and adjacent memory structures. Fifth, by carefully engineering the heap layout and controlling the overflowed contents, the attacker overwrites critical kernel function pointers or control data structures. Finally, subsequent execution flow redirection leads to arbitrary code execution in kernel mode, resulting in successful local privilege escalation and complete compromise of the operating system security boundary."
}