# CVE-2016-6303: Node.js 4: Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows…

CVE-2016-6303 is fixed in Node.js 4 on 1 platform by Node.js 4 4.6.0 (version 4.6.0), released September 27, 2016. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2016-6303
- Priority: Urgent
- CVSS: 9.8
- EPSS: 0.3199
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2016
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2016-6303

## Description

Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or possibly have unspecified other impact via unknown vectors.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 4 | 4.6.0 | [Node.js 4 4.6.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.4-4.6.0.md) | Sep 27, 2016 |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo