CVE-2026-69859 Windows USB Audio Class driver (usbaudio.sys) Elevation of Privilege Vulnerability

{
  "id": "96f4ee79bd33850c84bed23f837ddd8491cb07a60b3ba2fece3a3dbdbe98158d",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69859",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-69859 Windows USB Audio Class driver (usbaudio.sys) Elevation of Privilege Vulnerability",
    "summary": "A time-of-check time-of-use race condition in the Windows USB Audio Class driver may let an authorized attacker elevate privileges locally.",
    "evidence": "Time-of-check time-of-use (toctou) race condition in Windows USB Audio Class driver (usbaudio.sys) allows an authorized attacker to elevate privileges locally.",
    "products": [
      {
        "name": {
          "value": "Windows USB Audio Class driver (usbaudio.sys)",
          "evidence": "Windows USB Audio Class driver (usbaudio.sys)"
        },
        "prerequisites": [
          {
            "value": "authorized attacker",
            "evidence": "allows an authorized attacker to elevate privileges locally"
          }
        ],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-69859",
        "evidence": "CVE-2026-69859 Windows USB Audio Class driver (usbaudio.sys) Elevation of Privilege Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 26547,
  "published_at": "2026-09-08T14:00:00+00:00"
}