CVE-2026-123607

Name	CVE-2026-123607
Description	Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net before 0.26.1 contain an unbounded loop vulnerability in DnssecDnsHandle NSEC3 closest-encloser proof validation when the SOA owner is not an ancestor of the QNAME. Upstream attackers can return NoData or NXDomain responses with a cross-zone SOA record to panic debug builds or exhaust memory in release builds.
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
rust-hickory-proto (PTS)	trixie	0.24.4-2	fixed
	forky, sid	0.26.3-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-hickory-proto	source	(unstable)	(not affected)

Notes

- rust-hickory-proto <not-affected> (Vulnerable code not present)
https://rustsec.org/advisories/RUSTSEC-2026-0118.html
https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3v94-mw7p-v465