BioStar BIOS Update Utility 1.9.7.3 IOCTL BSMEM64_W10.sys sub_110BC PhysicalAddress/Size write-what-where

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.
8.0$0-$5k2.75-

Summaryinfo

A vulnerability has been found in BioStar BIOS Update Utility 1.9.7.3 and classified as critical. Impacted is the function sub_110BC of the file BSMEM64_W10.sys of the component IOCTL Handler. This manipulation of the argument PhysicalAddress/Size causes write-what-where. This vulnerability is handled as CVE-2026-94146. It is possible to launch the attack on the local host. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical was found in BioStar BIOS Update Utility 1.9.7.3. Affected by this vulnerability is the function sub_110BC of the file BSMEM64_W10.sys of the component IOCTL Handler. The manipulation of the argument PhysicalAddress/Size with an unknown input leads to a write-what-where vulnerability. The CWE definition for the vulnerability is CWE-123. Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability.

This vulnerability is known as CVE-2026-94146. The exploitation appears to be easy. An attack has to be approached locally. Technical details and also a public exploit are known.

It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-83847). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

Class: Write-what-where
CWE: CWE-123 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/20/2026 Advisory disclosed
09/20/2026 +0 days VulDB entry created
09/21/2026 +1 days VulDB entry last update

Sourcesinfo

Status: Not defined

CVE: CVE-2026-94146 (🔒)
GCVE (CVE): GCVE-0-2026-94146
GCVE (VulDB): GCVE-100-408061
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/20/2026 22:36
Updated: 09/21/2026 11:58
Changes: 09/20/2026 22:36 (55), 09/21/2026 11:58 (1)
Complete: 🔍
Submitter: Bigcat
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #894066: BIOSTAR Group BIOS Update Utility 1.9.7.3 Arbitrary Kernel Memory Read/Write (by Bigcat)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!