# CVE-2022-25638: wolfssl: In wolfSSL before 5.2.0, certificate validation may be bypassed during attempted authentication by a TLS 1.3 client t...

CVE-2022-25638 is fixed in wolfssl on 1 platform, first by DEBIAN-CVE-2022-25638, released February 24, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-25638
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0063
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 24, 2022

## Description

In wolfSSL before 5.2.0, certificate validation may be bypassed during attempted authentication by a TLS 1.3 client to a TLS 1.3 server. This occurs when the sig_algo field differs between the certificate_verify message and the certificate message.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | wolfssl Debian 12.15 (bookworm) | 5.2.0-1 | [DEBIAN-CVE-2022-25638](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25638.md) | Feb 24, 2022 |
| Linux | wolfssl Debian 13.5 (trixie) | 5.2.0-1 | [DEBIAN-CVE-2022-25638](https://patchblox.com/security/data/fix/linux/debian-cve-2022-25638.md) | Feb 24, 2022 |

---

Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.