CVE-2024-27983
HIGHEPSS 100th pctlDescription
An attacker can make the Node.js HTTP/2 server completely unavailable by sending a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside. It is possible to leave some data in nghttp2 memory after reset when headers with HTTP/2 CONTINUATION frame are sent to the server and then a TCP connection is abruptly closed by the client triggering the Http2Session destructor while header frames are still being processed (and stored in memory) causing a race condition.
How to fix
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
References
Related Vulnerabilities
Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-6387 | High | 8.1 | 100% | - | Fix |
| CVE-2023-36884 | High | 7.5 | 99% | KEV + Ransom | Fix |
| CVE-2018-15473 | Medium | 5.3 | 99% | - | Fix |
| CVE-2014-0226 | Medium | 6.8 | 86% | - | Fix |
| CVE-2016-5195 | High | 7.0 | 84% | KEV | Fix |
| CVE-2023-28126 | Medium | 5.9 | 67% | - | - |
Common questions
How do I fix CVE-2024-27983?
Published advisories record a fix for 57 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2024-27983 being actively exploited?
Not that we know of. CVE-2024-27983 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 87.2% is the estimated probability that it will be exploited in the next 30 days. That is higher than 100% of all scored CVEs.
How severe is CVE-2024-27983?
CVE-2024-27983 has a CVSS v3 base score of 8.2, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2024-27983 affect?
Published advisories record a fix for nodejs (Amazon), nodejs-debuginfo (Amazon), nodejs-debugsource (Amazon), nodejs-devel (Amazon), and 53 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.