Realtek RtUsbA64.sys 6.3.9600.2393 untrusted pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.8$0-$5k1.18-

Summaryinfo

A vulnerability, which was classified as very critical, was found in Realtek RtUsbA64.sys 6.3.9600.2393. This issue affects some unknown processing of the file RtUsbA64.sys. The manipulation results in untrusted pointer dereference. This vulnerability is cataloged as CVE-2026-90975. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Realtek RtUsbA64.sys 6.3.9600.2393. Affected is some unknown functionality of the file RtUsbA64.sys. The manipulation with an unknown input leads to a untrusted pointer dereference vulnerability. CWE is classifying the issue as CWE-822. The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at nozominetworks.com. This vulnerability is traded as CVE-2026-90975 since 09/14/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/06/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Untrusted pointer dereference
CWE: CWE-822
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/14/2026 CVE reserved
11/06/2026 +53 days Advisory disclosed
11/06/2026 +0 days VulDB entry created
11/06/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: nozominetworks.com
Status: Not defined

CNA: certcc
CVE: CVE-2026-90975 (🔒)

GCVE (CVE): GCVE-0-2026-90975
GCVE (VulDB): GCVE-100-432084

Entryinfo

Created: 11/06/2026 20:00
Changes: 11/06/2026 20:00 (52)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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