# CVE-2021-22883: Node.js 14 and 3 others: Denial of Service (CWE-400)

CVE-2021-22883 is fixed in 12 products on 2 platforms, first by Node.js 10 10.24.0, released February 23, 2021. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-22883
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.7739
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 3, 2021
- Weakness: CWE-400: Denial of Service (CWE-400)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-22883

## Description

Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of file descriptors. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and prevent the process also from opening, e.g. a file. If no file descriptor limit is configured, then this lead to an excessive memory usage and cause the system to run out of memory.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js 10 | 10.24.0 | [Node.js 10 10.24.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.10-10.24.0.md) | Feb 23, 2021 |
| Windows apps | Node.js 12 | 12.21.0 | [Node.js 12 12.21.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.12-12.21.0.md) | Feb 23, 2021 |
| Windows apps | Node.js 14 | 14.16.0 | [Node.js 14 14.16.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.14-14.16.0.md) | Feb 23, 2021 |
| Windows apps | Node.js 15 | 15.10.0 | [Node.js 15 15.10.0](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.15-15.10.0.md) | Feb 23, 2021 |
| Linux | libnode64 Ubuntu 20.04 LTS (focal) | 10.19.0~dfsg-3ubuntu1.2 | [libnode64 10.19.0~dfsg-3ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnode64-10.19.0-dfsg-3ubuntu1.2.md) | Mar 3, 2021 |
| Linux | nodejs RHEL 8 | 1:14.16.0-2.module+el8.3.0+10180+b92e1eb6 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | nodejs Ubuntu 20.04 LTS (focal) | 10.19.0~dfsg-3ubuntu1.2 | [nodejs 10.19.0~dfsg-3ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-nodejs-10.19.0-dfsg-3ubuntu1.2.md) | Mar 3, 2021 |
| Linux | nodejs ol 8 | 1:12.21.0-1.module+el8.3.0+9672+c7b0544d | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |
| Linux | nodejs-devel RHEL 8 | 1:14.16.0-2.module+el8.3.0+10180+b92e1eb6 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | nodejs-devel ol 8 | 1:12.21.0-1.module+el8.3.0+9672+c7b0544d | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |
| Linux | nodejs-docs RHEL 8 | 1:14.16.0-2.module+el8.3.0+10180+b92e1eb6 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | nodejs-docs ol 8 | 1:12.21.0-1.module+el8.3.0+9672+c7b0544d | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |
| Linux | nodejs-full-i18n RHEL 8 | 1:14.16.0-2.module+el8.3.0+10180+b92e1eb6 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | nodejs-full-i18n ol 8 | 1:12.21.0-1.module+el8.3.0+9672+c7b0544d | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |
| Linux | nodejs-nodemon RHEL 8 | 0:2.0.3-1.module+el8.3.0+6519+9f98ed83 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | nodejs-nodemon ol 8 | 0:2.0.3-1.module+el8.3.0+9643+8c99e187 | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |
| Linux | nodejs-packaging RHEL 8 | 0:23-3.module+el8.3.0+6519+9f98ed83 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | nodejs-packaging ol 8 | 0:17-3.module+el8.1.0+5393+aaf413e3 | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |
| Linux | npm RHEL 8 | 1:6.14.11-1.14.16.0.2.module+el8.3.0+10180+b92e1eb6 | [RHSA-2021:0744](https://patchblox.com/security/data/fix/linux/rhsa-2021-0744.md) | Mar 8, 2021 |
| Linux | npm ol 8 | 1:6.14.11-1.12.21.0.1.module+el8.3.0+9672+c7b0544d | [ELSA-2021-0734](https://patchblox.com/security/data/fix/linux/elsa-2021-0734.md) | Mar 5, 2021 |

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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

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