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": "2026-08-11T17:18:58.250Z",
  "pubdate": "2026-08-11T17:18:58.250Z",
  "executiveSummary": "This vulnerability is classified as a heap-based buffer overflow affecting the Desktop Window Manager component. The primary impact of successful exploitation is local privilege escalation, allowing an unauthorized attacker to execute arbitrary code with elevated system privileges.\nThe affected product is the Desktop Window Manager across unspecified versions. Risk implications are severe, as an attacker who has achieved initial local access can compromise the integrity and confidentiality of the host operating system by leveraging this flaw to bypass standard security boundaries.\nAttacker capabilities require local execution context on the target machine. While authorization is noted as a precondition, the vulnerability facilitates the escalation of permissions from a standard user context to a higher privilege level, typically SYSTEM or Administrator, depending on the service execution context.\nExploitation requirements include the ability to execute code locally on the target system and interact with the Desktop Window Manager. No remote network exposure is indicated in the provided vector, limiting the initial threat surface strictly to local adversaries or compromised low-privileged execution environments.",
  "technicalDetails": "The root cause of the vulnerability resides in memory management deficiencies within the Desktop Window Manager when processing data structures or rendering operations. Specifically, improper bounds checking or arithmetic overflow conditions during heap allocation or copy operations lead to a heap-based buffer overflow condition.\nThe vulnerable component is the Desktop Window Manager, which handles graphical rendering, visual effects, and window composition within the operating system architecture. The vulnerability is triggered when input data or command sequences sent to the component exceed the allocated heap buffer size, resulting in adjacent memory corruption.\nRegarding authentication and privilege requirements, the attack requires local access and an authorized local execution context. The network exposure is zero, as the attack vector is strictly local. Exploitation cannot be performed remotely without prior local code execution or an existing foothold on the target machine.\nThe step-by-step attack flow proceeds as follows: First, the local attacker establishes execution within a standard user context. Second, the attacker interacts with the Desktop Window Manager API or IPC mechanisms, supplying a maliciously crafted payload designed to trigger the heap-based buffer overflow. Third, the malformed input is processed by the vulnerable component, causing heap corruption by overwriting adjacent heap chunks, metadata, or function pointers.\nUpon successful overwriting of critical memory structures, payload behavior includes the redirection of execution flow to attacker-supplied shellcode or the manipulation of object states to achieve arbitrary code execution. The post-exploitation impact allows the attacker to inherit the security context of the Desktop Window Manager process, successfully achieving local privilege escalation to compromise the entire host operating system."
}