{"id":"DEBIAN-CVE-2026-93011","details":"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.","modified":"2026-10-30T05:00:08.736436107Z","published":"2026-10-29T13:17:16.220Z","upstream":["CVE-2026-93011"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-93011"}],"affected":[{"package":{"name":"dnsmasq","ecosystem":"Debian:12","purl":"pkg:deb/debian/dnsmasq?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.89-1","2.90-1","2.90-2","2.90-3","2.90-4","2.90-4~deb12u1","2.90-4~deb12u2","2.90-5","2.90-6","2.90-7","2.91-1","2.91~test6-1","2.91~test9-1","2.92-1","2.92-1+exp1","2.92-1~exp1","2.92-2","2.92-3","2.92-4","2.92-5","2.92~rc1-1","2.92~rc3-1","2.93-1","2.93-2","2.93-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93011.json"}},{"package":{"name":"dnsmasq","ecosystem":"Debian:13","purl":"pkg:deb/debian/dnsmasq?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.91-1","2.91-1+deb13u1","2.91-1+deb13u2","2.92-1","2.92-1+exp1","2.92-1~exp1","2.92-2","2.92-3","2.92-4","2.92-5","2.92~rc1-1","2.92~rc3-1","2.93-1","2.93-2","2.93-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93011.json"}},{"package":{"name":"dnsmasq","ecosystem":"Debian:14","purl":"pkg:deb/debian/dnsmasq?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.91-1","2.92-1","2.92-1+exp1","2.92-1~exp1","2.92-2","2.92-3","2.92-4","2.92-5","2.92~rc1-1","2.92~rc3-1","2.93-1","2.93-2","2.93-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-93011.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}