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Vulnerability record · CVE-2023-40583 · published 25 August 2023

CVE-2023-40583: Protocol libp2p uncontrolled resource consumption vulnerability

Protocol · Libp2p

libp2p is a networking stack and library modularized out of The IPFS Project, and bundled separately for other tools to use. In go-libp2p, by using signed peer records a malicious actor can store an arbitrary amount of data in a remote node’s memory. This memory does not get garbage collected and so the victim can run out of memory and crash. If users of go-libp2p in production are not monitoring memory consumption over time, it could be a silent attack i.e. the attacker could bring down nodes over a period of time (how long depends on the node resources i.e. a go-libp2p node on a virtual server with 4 gb of memory takes about 90 sec to bring down; on a larger server, it might take a bit longer.) This issue was patched in version 0.27.4.

7.5 CVSS 3.1 High EPSS 0.95% · top 40.2% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
0.95%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

libp2p is a networking stack and library modularized out of The IPFS Project, and bundled separately for other tools to use. In go-libp2p, by using signed peer records a malicious actor can store an arbitrary amount of data in a remote node’s memory. This memory does not get garbage collected and so the victim can run out of memory and crash. If users of go-libp2p in production are not monitoring memory consumption over time, it could be a silent attack i.e. the attacker could bring down nodes over a period of time (how long depends on the node resources i.e. a go-libp2p node on a virtual server with 4 gb of memory takes about 90 sec to bring down; on a larger server, it might take a bit longer.) This issue was patched in version 0.27.4.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/libp2p/go-libp2p/commit/45d3c6fff662ddd6938982e7e9309ad5fa2ad8dd Patch
https://github.com/libp2p/go-libp2p/releases/tag/v0.27.4 Release Notes
https://github.com/libp2p/go-libp2p/releases/tag/v0.27.7 Release Notes
https://github.com/libp2p/go-libp2p/security/advisories/GHSA-gcq9-qqwx-rgj3 Vendor Advisory
https://github.com/libp2p/go-libp2p/commit/45d3c6fff662ddd6938982e7e9309ad5fa2ad8dd Patch
https://github.com/libp2p/go-libp2p/releases/tag/v0.27.4 Release Notes
https://github.com/libp2p/go-libp2p/releases/tag/v0.27.7 Release Notes
https://github.com/libp2p/go-libp2p/security/advisories/GHSA-gcq9-qqwx-rgj3 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-40583), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.