| Name | CVE-2026-78301 |
| Description | A malformed zone may contain an NS or DNAME node above its origin, which `named` treats as a zone cut. If an attacker inserts a malformed zone into a BIND authoritative server (e.g., via zone transfer), queries for names inside the configured zone then lose authoritative status and return an out-of-zone delegation. On a server that also provides recursion BIND can follow this locally sourced cut and cache attacker-supplied data, affecting names outside the configured zone. This situation persists as long as the malformed zone remains in the zone database. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1. |
| 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) |
| References | DSA-6505-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| bind9 (PTS) | bookworm | 1:9.18.49-1~deb12u1 | vulnerable |
| bookworm (security) | 1:9.18.49-1~deb12u2 | vulnerable | |
| trixie | 1:9.20.26-1~deb13u1 | vulnerable | |
| trixie (security) | 1:9.20.29-1~deb13u1 | fixed | |
| forky, sid | 1:9.20.29-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bind9 | source | trixie | 1:9.20.29-1~deb13u1 | DSA-6505-1 | ||
| bind9 | source | (unstable) | 1:9.20.29-1 |
https://kb.isc.org/docs/cve-2026-78301