Description

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

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:18:10.757Z",
  "pubdate": "2026-08-11T17:18:10.757Z",
  "executiveSummary": "This vulnerability is classified as a heap-based buffer overflow affecting Windows Storage. The security flaw allows an authenticated local attacker to achieve privilege escalation on targeted systems. The presence of this vulnerability introduces significant risk to host integrity, as unauthorized elevation of privileges can lead to complete compromise of the underlying operating system. Exploitation of this flaw requires the attacker to have prior local access to the system and authorization to interact with the vulnerable Windows Storage component. The mechanism involves supplying maliciously crafted input that exceeds allocated heap memory bounds during processing, thereby corrupting adjacent heap structures and facilitating arbitrary code execution with elevated privileges. Remediation requires the application of official vendor patches as soon as they become available, alongside standard local security hardening practices to restrict unauthorized execution vectors.",
  "technicalDetails": "The vulnerability resides within the heap memory management routines of Windows Storage, specifically involving insecure bounds checking during the processing of data operations. As a heap-based buffer overflow, the root cause stems from the application failing to properly validate the size of input data before copying it into a dynamically allocated heap buffer. An authenticated local attacker begins the attack flow by preparing a specialized payload designed to overflow the target heap chunk allocated by the vulnerable component. Upon invoking the vulnerable functionality within Windows Storage, the oversized data is written to the heap, overwriting adjacent memory metadata, function pointers, or critical application objects. By carefully controlling the contents of the overflow, the attacker can manipulate heap structures to achieve arbitrary code execution in the context of a privileged user or system process. The attack vector is strictly local, requiring the threat actor to execute code on the target machine with sufficient privileges to interact with the Windows Storage subsystem, though not initially possessing administrative rights. Network exposure is non-existent as the attack cannot be launched remotely. Successful exploitation results in local privilege escalation, allowing the attacker to bypass security boundaries, execute arbitrary commands with elevated privileges, compromise sensitive system resources, and establish persistent control over the host operating system."
}