CVE-2024-27983

Advisory lineage Upstream: 0 Downstream: 28
Deferred
Published: 09 Apr 2024, 01:06
Last modified:04 Nov 2025, 18:30

Vulnerability Summary

Overall Risk (default)
medium
48/100
CVSS Score
8.2 HIGH
v3.0 (cve.org)
EPSS Score
75.93% CRITICAL
76% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

09 Apr 2024, 01:06
Published
Vulnerability first disclosed
04 Nov 2025, 18:30
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.0•HIGH•Score: 8.2CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS Trends

Current EPSS score: 75.93%• Percentile: 99%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

  • nodejs•node

    ≥ 4.0, < 4.* | ≥ 5.0, < 5.* | ≥ 6.0, < 6.* | ≥ 7.0, < 7.* | ≥ 8.0, < 8.* | ≥ 9.0, < 9.* | ≥ 10.0, < 10.* | ≥ 11.0, < 11.* | ≥ 12.0, < 12.* | ≥ 13.0, < 13.* | ≥ 14.0, < 14.* | ≥ 15.0, < 15.* | ≥ 16.0, < 16.* | ≥ 17.0, < 17.* | ≥ 18.0, < 18.20.1 | ≥ 19.0, < 19.* | ≥ 20.0, < 20.12.1 | ≥ 21.0, < 21.7.2

References (7)