# CVE-2022-25640: wolfssl: In wolfSSL before 5.2.0, a TLS 1.3 server cannot properly enforce a requirement for mutual authentication

CVE-2022-25640 is fixed in wolfssl on 1 platform, first by DEBIAN-CVE-2022-25640, released February 24, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-25640
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0135
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 24, 2022

## Description

In wolfSSL before 5.2.0, a TLS 1.3 server cannot properly enforce a requirement for mutual authentication. A client can simply omit the certificate_verify message from the handshake, and never present a certificate.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | wolfssl Debian 12.15 (bookworm) | 5.2.0-1 | [DEBIAN-CVE-2022-25640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25640.md) | Feb 24, 2022 |
| Linux | wolfssl Debian 13.5 (trixie) | 5.2.0-1 | [DEBIAN-CVE-2022-25640](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25640.md) | Feb 24, 2022 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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