Rtusba64.sys CVEs and Security Vulnerabilities

CVE-2026-90975

A vulnerability in Realtek's RtUsbA64.sys USB audio driver allows a local, low-privileged user to abuse a kernel I/O control (IOCTL) interface that acts on a caller-supplied user-mode pointer without proper validation or capture. By issuing crafted property requests an attacker can obtain kernel-mode read and write access, which can be leveraged for local privilege escalation and arbitrary kernel code execution.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Realtek

Products

Rtusba64.sys

CVE-2026-122113

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.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed