---
id: "CVE-2026-122113"
page: "https://infrastack.ai/live/CVE-2026-122113"
kind: "vulnerability"
aliases: ["CVE-2026-122113"]
title: "Realtek USB audio driver: crafted USB device crashes Windows during enumeration"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "realtek", "usb-audio", "windows"]
not_affected_if: ["no-physical-usb-access", "no-realtek-usb-audio-driver"]
published_at: "2026-11-06T19:17:43+00:00"
first_seen_at: "2026-11-06T19:43:48+00:00"
updated_at: "2026-11-06T19:46:16+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-122113", "first_seen_at": "2026-11-06T19:43:48+00:00"}]
exploit_sources: []
---

# Realtek USB audio driver: crafted USB device crashes Windows during enumeration

Link for people: https://infrastack.ai/live/CVE-2026-122113 (this .md is for agents)

Realtek's RtUsbA64.sys USB audio driver recurses without limit when parsing a crafted USB device's topology descriptor during enumeration. The kernel stack is exhausted, so the system crashes (bugcheck), which is a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check whether the machine has the Realtek USB audio driver: look for `RtUsbA64.sys` in `C:\Windows\System32\drivers\`

## Timeline

- 2026-11-06T19:43:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-122113

## From the sources

A vulnerability in Realtek's RtUsbA64.sys USB audio driver allows a physically present attacker using a maliciously crafted USB device to trigger unbounded recursion in the driver's topology-parsing logic during device enumeration. Processing the crafted descriptor exhausts the kernel stack and causes a system crash (bugcheck), resulting in a denial of service. No authenticated user session is required.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_