CVE-2026-93011

Name	CVE-2026-93011
Description	A flaw was found in dnsmasq. After a reduction of internal domain-name buffer sizes, the DNSSEC validator can write a few bytes past a name buffer when converting names to and from DNS wire format. An attacker who can cause the server to validate a crafted DNSSEC response may overwrite a small amount of adjacent heap metadata. DNSSEC support is not compiled in by default and must also be enabled at runtime.
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
dnsmasq (PTS)	bookworm, bookworm (security)	2.90-4~deb12u2	vulnerable
	trixie	2.91-1+deb13u2	vulnerable
	trixie (security)	2.91-1+deb13u1	vulnerable
	forky, sid	2.93-3	vulnerable

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

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

https://bugzilla.redhat.com/show_bug.cgi?id=2536082
check upstream details