| Name | CVE-2026-1519 |
| Description | If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-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-6181-1 |
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) | 1:9.18.47-1~deb12u1 | fixed | |
| trixie | 1:9.20.18-1~deb13u1 | vulnerable | |
| trixie (security) | 1:9.20.21-1~deb13u1 | fixed | |
| forky | 1:9.20.20-1 | vulnerable | |
| sid | 1:9.20.21-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| bind9 | source | bookworm | 1:9.18.47-1~deb12u1 | DSA-6181-1 | ||
| bind9 | source | trixie | 1:9.20.21-1~deb13u1 | DSA-6181-1 | ||
| bind9 | source | (unstable) | 1:9.20.21-1 |
https://kb.isc.org/docs/cve-2026-1519
https://gitlab.isc.org/isc-projects/bind9/-/commit/05c51d3a5aedf7cb56407c5df02f7ab6deaf5755 (v9.20.21)
https://gitlab.isc.org/isc-projects/bind9/-/commit/cd1f2fed56d8e93ddd1e0b7b240cb61f6774dcfd (v9.20.21)
https://gitlab.isc.org/isc-projects/bind9/-/commit/4ba3caff98f8d0ed585e6a30087202007e072ffb (v9.20.21)
https://gitlab.isc.org/isc-projects/bind9/-/commit/1fb2c667fd3b38614687056244ba96200c31b59b (v9.20.21)
https://gitlab.isc.org/isc-projects/bind9/-/commit/ef01ff31db4be0d737949fd785fa52c491041eb4 (v9.20.21)