{"id":"DEBIAN-CVE-2026-12244","details":"If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size \u003e 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes","modified":"2026-09-14T17:01:42.442241083Z","published":"2026-06-25T07:16:44.900Z","upstream":["CVE-2026-12244"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-12244"}],"affected":[{"package":{"name":"nsd","ecosystem":"Debian:14","purl":"pkg:deb/debian/nsd?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.3-1"}]}],"versions":["4.12.0-1","4.12.0-2","4.13.0-1","4.13.0-2","4.13.0-3","4.13.0-4","4.13.0-5","4.13.0-6","4.14.0-1","4.14.1-1","4.14.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-12244.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}