# CVE-2021-44718: wolfssl: wolfSSL through 5.0.0 allows an attacker to cause a denial of service and infinite loop in the client component by se...

CVE-2021-44718 is fixed in wolfssl on 1 platform, first by DEBIAN-CVE-2021-44718, released September 2, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-44718
- Priority: Routine
- CVSS: 5.9 (medium)
- EPSS: 0.0079
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 2, 2022

## Description

wolfSSL through 5.0.0 allows an attacker to cause a denial of service and infinite loop in the client component by sending crafted traffic from a Machine-in-the-Middle (MITM) position. The root cause is that the client module accepts TLS messages that normally are only sent to TLS servers.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | wolfssl Debian 12.15 (bookworm) | 5.1.1-1 | [DEBIAN-CVE-2021-44718](https://patchblox.com/security/data/fix/linux/debian-cve-2021-44718.md) | Sep 2, 2022 |
| Linux | wolfssl Debian 13.5 (trixie) | 5.1.1-1 | [DEBIAN-CVE-2021-44718](https://patchblox.com/security/data/fix/linux/debian-cve-2021-44718.md) | Sep 2, 2022 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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