Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.0",
  "pubDate": "2026-08-11T17:18:18.530Z",
  "pubdate": "2026-08-11T17:18:18.530Z",
  "executiveSummary": "A local privilege escalation vulnerability exists in Windows Push Notifications due to a concurrent execution using a shared resource with improper synchronization, commonly categorized as a race condition.\nThe vulnerability allows an authorized local attacker to elevate their privileges on the affected system.\nThe flaw affects the Windows Push Notifications component, posing significant risk implications as a successful exploit enables unauthorized capability expansion beyond the initial security context.\nExploitation requires local access to the target system and an authorized execution context to manipulate the timing or state of the shared resource during concurrent operations.\nThe primary impact of this security flaw is unauthorized local privilege escalation, potentially granting the attacker higher-level system access for subsequent malicious activities.",
  "technicalDetails": "The root cause of the vulnerability is a concurrent execution using a shared resource with improper synchronization, which manifests as a classic race condition within the Windows Push Notifications subsystem.\nThe vulnerable component handles shared resources or states across execution threads without enforcing adequate mutual exclusion or atomic operations, creating a temporal window of vulnerability.\nAn authorized local attacker exploits this flaw by initiating concurrent operations that target the improperly synchronized shared resource, attempting to induce a race condition during the processing lifecycle managed by Windows Push Notifications.\nBecause synchronization mechanisms fail to serialize access properly, the attacker can manipulate the state of the shared resource between the validation phase and the operational usage phase, leading to unintended system behavior.\nAuthentication requirements dictate that the attacker must possess local execution capabilities and authorization to interact with the vulnerable Windows Push Notifications component.\nPrivilege requirements are limited to local access, where the attacker leverages the race condition to bridge the gap from a lower privilege level to an elevated security context.\nNetwork exposure is non-existent for this specific attack vector, as the exploitation must be executed locally on the target machine.\nPost-exploitation impact includes the successful elevation of privileges locally, allowing the execution of arbitrary code or administrative actions depending on the achieved privilege context resulting from the race condition."
}