CVE-2026-3104

Name	CVE-2026-3104
Description	A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
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
bind9 (PTS)	bullseye	1:9.16.50-1~deb11u2	vulnerable
	bullseye (security)	1:9.16.50-1~deb11u4	vulnerable
	bookworm	1:9.18.41-1~deb12u1	vulnerable
	bookworm (security)	1:9.18.44-1~deb12u1	vulnerable
	trixie (security), trixie	1:9.20.18-1~deb13u1	vulnerable
	forky	1:9.20.20-1	vulnerable
	sid	1:9.20.21-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
bind9	source	(unstable)	(unfixed)

https://kb.isc.org/docs/cve-2026-3104