eio.sys
ASUS legacy GPU utility driver (SmartDoctor / early GPU Tweak)
eio.sys is a legacy ASUS graphics-utility driver, signed by ASUSTeK, that shipped with older versions of ASUS GPU tuning software (SmartDoctor and early GPU Tweak builds) for fan, voltage, and VGA tuning on ASUS graphics cards. It predates the modern ASUS Aura and Armoury Crate driver family.
There is no public CVE specifically assigned to it. Microsoft added the driver to the recommended driver block list because of the kernel-level primitives it exposes through an interface any local user can reach. LOLDrivers tracks multiple hash variants under the same filename.
If you have a current ASUS graphics card and have moved to GPU Tweak III or to the current Armoury Crate, this legacy driver is leftover from an older install and can be removed. Microsoft's Vulnerable Driver Blocklist (on by default in modern Windows 11) blocks it from loading.
eio.sys is listed as a known-vulnerable driver on the public LOLDrivers project. 2 distinct binary hashes matching this filename are on record, meaning multiple versions of the file have been observed.
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. “eio.sys.” Vera Field Guide (Driver). The Vera Project. https://www.veraproject.xyz/field-guide/drivers/eio-sys