# CVE-2022-42961: wolfssl: An issue was discovered in wolfSSL before 5.5.0

CVE-2022-42961 is fixed in wolfssl on 1 platform, first by DEBIAN-CVE-2022-42961, released October 15, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-42961
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0068
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2022

## Description

An issue was discovered in wolfSSL before 5.5.0. A fault injection attack on RAM via Rowhammer leads to ECDSA key disclosure. Users performing signing operations with private ECC keys, such as in server-side TLS connections, might leak faulty ECC signatures. These signatures can be processed via an advanced technique for ECDSA key recovery. (In 5.5.0 and later, WOLFSSL_CHECK_SIG_FAULTS can be used to address the vulnerability.)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | wolfssl Debian 12.15 (bookworm) | 5.5.3-1 | [DEBIAN-CVE-2022-42961](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42961.md) | Oct 15, 2022 |
| Linux | wolfssl Debian 13.5 (trixie) | 5.5.3-1 | [DEBIAN-CVE-2022-42961](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42961.md) | Oct 15, 2022 |

---

Data as of 2026-11-12T01:51:14Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo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.