CVE-2025-59464

Name	CVE-2025-59464
Description	A memory leak in Node.js’s OpenSSL integration occurs when converting `X.509` certificate fields to UTF-8 without freeing the allocated buffer. When applications call `socket.getPeerCertificate(true)`, each certificate field leaks memory, allowing remote clients to trigger steady memory growth through repeated TLS connections. Over time this can lead to resource exhaustion and denial of service.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nodejs (PTS)	bullseye	12.22.12~dfsg-1~deb11u4	fixed
	bullseye (security)	12.22.12~dfsg-1~deb11u7	fixed
	bookworm, bookworm (security)	18.20.4+dfsg-1~deb12u1	fixed
	trixie	20.19.2+dfsg-1	fixed
	forky, sid	22.22.0+dfsg+~cs22.19.6-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nodejs	source	(unstable)	(not affected)

Notes

- nodejs <not-affected> (Only affects Node.js v24 releases and fixed in v24.12.0)
https://nodejs.org/en/blog/vulnerability/december-2025-security-releases#memory-leak-that-enables-remote-denial-of-service-against-applications-processing-tls-client-certificates-cve-2025-59464---medium