CVE-2021-22883
No exploitation reported by the sources we read.
- Published2021-03-03
- Fixed in15.10.0 · 14.16.0 · 12.21.0 · 10.24.0
- WeaknessCWE-400 · CWE-772
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2021-03-0318:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22883?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22883?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 15.x | ≥ 15.0.0, < 15.10.0 | 15.10.0 | NVD |
| 14.x | ≥ 14.0.0, < 14.16.0 | 14.16.0 | NVD |
| 12.x | ≥ 12.0.0, < 12.21.0 | 12.21.0 | NVD |
| 10.x | ≥ 10.0.0, < 10.24.0 | 10.24.0 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 32.x | = 32 | no fix published | NVD |
| 33.x | = 33 | no fix published | NVD |
| 34.x | = 34 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 19.3 | = 19.3.5 | no fix published | NVD |
| 20.3 | = 20.3.1.2 | no fix published | NVD |
| 21.0 | = 21.0.0.2 | no fix published | NVD |
6 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Node.js to 15.10.0 · 14.16.0 · 12.21.0 · 10.24.0
Advisories and patches
- cert-portal.siemens.comPatch
- nodejs.orgPatch · Release Notes · Vendor Advisory
- www.oracle.comPatch
- www.oracle.comPatch
- www.oracle.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.17.5read 2026-10-23
- NVDCVSS 2.07.8read 2026-10-23
- CNAweakness (CWE)CWE-400read 2026-10-23
- NVDweakness (CWE)CWE-772read 2026-10-23
- FIRST EPSSEPSS score77.4 %read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published
- 2021-03-03
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-22883?
Is CVE-2021-22883 actively exploited?
What is the CVSS score for CVE-2021-22883?
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