BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where
Published Sep 21, 2026 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
A vulnerability was found in BioStar BIOS Update Utility 1.9.7.3. This issue affects the function sub_110BC of the file BSMEM64_W10.sys of the component IOCTL Handler. The manipulation of the argument PhysicalAddress/Size results in write-what-where condition. Attacking locally is a requirement. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- MEDIUM
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- VDB-408061 | BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where ↗
- VDB-408061 | CTI Indicators (IOB, IOC, IOA) ↗
- CVE-2026-94146 | CVE Analysis and Report ↗
- Submit #894066 | BIOSTAR Group BIOS Update Utility 1.9.7.3 Arbitrary Kernel Memory Read/Write ↗
Record history
Published Sep 21, 2026 · Last refreshed Nov 3, 2026