bs_hwmio64.sys
BIOSTAR hardware-monitoring I/O driver (64-bit variant)
bs_hwmio64.sys is a sibling to bs_hwmio64_w10.sysDriverbs_hwmio64_w10.sysBIOSTAR hardware I/O driverOpen plate → (the Windows 10 build) curated separately in the Field Guide. Both are BIOSTAR motherboard utility drivers for hardware I/O and monitoring, used by BIOSTAR's RACING and Hi-Fi motherboard tuning suites. Other family members already curated include bs_rcio.sysDriverbs_rcio.sysBIOSTAR RACING GT Evo motherboard utility driverOpen plate → and bs_i2cio.sys.
No CVE is specifically attributed to this variant in NVD as of this writing; the broader BIOSTAR utility-driver class is on the LOLDrivers list for the same kind of access surface a hardware-monitoring driver requires (physical-memory reads, port I/O, MSR access).
If you do not own a BIOSTAR motherboard or use BIOSTAR tuning software, this file has no business being on disk. If you do, update the BIOSTAR suite; Microsoft's Vulnerable Driver Blocklist blocks the older signed builds from loading.
bs_hwmio64.sys is listed as a known-vulnerable driver on the public LOLDrivers project. One distinct binary hash matching this filename is on record.
Status data comes from the public LOLDrivers project, a community-curated registry of drivers known to be vulnerable or malicious. The snapshot Vera uses was refreshed July 10, 2026. CVE links go to the NIST National Vulnerability Database.
Vera Project. “bs_hwmio64.sys.” Vera Field Guide (Driver). The Vera Project. https://www.veraproject.xyz/field-guide/drivers/bs-hwmio64-sys