CVE-2026-14258

Name	CVE-2026-14258
Description	A flaw was found in dhcpcd's IPv6 Neighbor Discovery Router Advertisement processing. A specially crafted IPv6 Router Advertisement containing a zero-length Neighbor Discovery option can bypass validation during packet storage and later be reparsed without adequate validation, causing the parser to enter a non-advancing loop. Successful exploitation may result in excessive CPU consumption, leading to a 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
dhcpcd (PTS)	trixie	1:10.1.0-11+deb13u3	vulnerable
	forky, sid	1:10.3.2-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dhcpcd	source	(unstable)	1:10.2.4-3

Notes

[trixie] - dhcpcd <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2462305
https://github.com/NetworkConfiguration/dhcpcd/issues/415
https://github.com/NetworkConfiguration/dhcpcd/commit/75289ca54211481d21b0c915db98dd733b30794f (v10.2.0)