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TI-2026-63351 Aliases CVE-2026-94146GHSA-3wfp-66vf-pgv2

BioStar BIOS Update Utility IOCTL BSMEM64_W10.sys sub_110BC write-what-where

Priority MEDIUM 41CWE-119Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00182 7th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
BioStarBIOS Update Utility1.9.7.3—No fix listedCNA
  • BIOS Update Utility VendorBioStar Affected 1.9.7.3 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:o:biostar:bios_update_utility:*:*:*:*:*:*:*:*——BioStar
  • cpe:2.3:o:biostar:bios_update_utility:*:*:*:*:*:*:*:* Versions — — ·BioStar

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-94146
  2. 2026-10-03 Alias added: GHSA-3wfp-66vf-pgv2

References

—

  • TI-2026-63347 BioStar Temperature Monitor Utility IOCTL BS_HWMIO64_W10.sys sub_1105C write-what-where CVSS 4.0CRITICAL 9.3
  • TI-2026-63340 BioStar VALKYRIE AURORA IOCTL BS_RVSIO64.sys sub_1105C write-what-where CVSS 4.0CRITICAL 9.3
  • TI-2026-63339 BioStar VIVID LED DJ IOCTL BS_LED64.sys sub_1105C write-what-where CVSS 4.0CRITICAL 9.3
  • TI-2021-20294 An issue was discovered in BS_RCIO64.sys in Biostar RACING GT Evo 2.1.1905.1700. CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences