rtkio.sys

Realtek I/O driver

From Realtek Semiconductor

Part of the Realtek family

Status

On a known-vulnerable list

Known variants

3 distinct hashes

Public CVEs

Field notes

rtkio.sys is a Realtek kernel I/O driver associated with Realtek's audio and integrated-device software. It is on the LOLDrivers list for vulnerabilities in older builds of Realtek's I/O drivers; CVE-2021-32537 is the most-cited public reference and applies to closely related Realtek HD Audio driver components.

Realtek hardware is on a large fraction of consumer motherboards and laptops, so the driver is unusually widespread. The simplest fix is to update Realtek's current audio driver from your motherboard or laptop OEM's support page.

What the record shows

rtkio.sys is listed as a known-vulnerable driver on the public LOLDrivers project. 3 distinct binary hashes matching this filename are on record, meaning multiple versions of the file have been observed.

Public CVEs

CVE-2021-32537

What this means, plainly

Presence is not proof of misuse. Driver files on the LOLDrivers list commonly ship with legitimate hardware tools, gaming software, or vendor utilities. Their presence is recorded as evidence on a record. It is never treated as a verdict about a person.

Related drivers

Other drivers in the Realtek family. See the whole family →

rtkio64.sys rtkiow10x64.sys rtkiow8x64.sys

Source

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.

In plain words

Kernel driver BYOVD Ring 0 Code-signing certificate Certificate revocation The full glossary →

Cite this entry

Vera Project. “rtkio.sys.” Vera Field Guide (Driver). The Vera Project. https://www.veraproject.xyz/field-guide/drivers/rtkio-sys