Description

Heap-based buffer overflow in Desktop Window Manager allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:18:58.423Z",
  "pubdate": "2026-08-11T17:18:58.423Z",
  "executiveSummary": "This vulnerability is classified as a heap-based buffer overflow affecting the Desktop Window Manager component.\nThe primary impact of this security flaw is local privilege escalation, allowing an authorized adversary to execute arbitrary code or commands with elevated privileges on the underlying operating system.\nThe affected product is the Desktop Window Manager, which handles graphical user interface rendering and composition.\nThe risk implications are severe, as a successful exploit enables standard users to bypass security boundaries, potentially leading to complete system compromise.\nAttacker capabilities require local access to the target system.\nExploitation requirements dictate that the attacker must already be authorized or authenticated on the local host to interact with the vulnerable component.",
  "technicalDetails": "The root cause of the vulnerability is a heap-based buffer overflow within the Desktop Window Manager.\nThe vulnerability resides in the memory management logic of the graphical rendering pipeline, specifically where dynamic memory buffers are allocated and populated during window composition and management tasks.\nAuthentication requirements dictate that the attacker must possess valid local execution capabilities on the target machine.\nPrivilege requirements are minimal prior to exploitation, as the attacker needs only standard user credentials to initiate local execution.\nNetwork exposure is non-existent, as the vulnerability is strictly local and cannot be exploited remotely over a network protocol.\nThe exploitation method involves supplying specially crafted input or manipulating graphical rendering requests processed by the Desktop Window Manager.\nThe step-by-step attack flow begins with the authorized local attacker executing a malicious payload designed to interact with the Desktop Window Manager APIs.\nDuring the interaction, the crafted input exceeds the boundaries of a dynamically allocated heap buffer, causing a memory corruption condition.\nBy carefully controlling the heap layout and overflowing adjacent memory structures, the attacker can overwrite critical function pointers or data structures utilized by the Desktop Window Manager.\nPayload behavior involves redirecting execution flow to shellcode or leveraging native capabilities to spawn a privileged command shell.\nThe post-exploitation impact includes gaining SYSTEM-level or elevated administrative privileges, allowing the adversary to disable security controls, access sensitive data, or persist within the environment."
}