CVE-2026-12617
Fixed in a distro release EPSS <1%CVSS 7.5
The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative server responds positively to the A query but delays the DNAME response and later responds negatively, `named` may quit unexpectedly. Or, if a client queries for a CNAME and A record for the same name to the resolver, and the authoritative server responds positively to the A query but delays the CNAME response and later responds with a self-referential CNAME, the same failure may occur. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
Products: ISC BIND 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.22 | bind | 9.20.26-r0 |
| Alpine 3.23 | bind | 9.20.26-r0 |
| Alpine 3.24 | bind | 9.20.26-r0 |
| Debian 12 | bind9 | 1:9.18.49-1~deb12u2 |
| Debian 13 | bind9 | 1:9.20.26-1~deb13u1 |
| Debian 14 | bind9 | 1:9.20.26-1 |
| Red Hat hummingbird 1 | bind | 0:9.20.26-0.1.hum1 |
| Red Hat hummingbird 1 | bind-chroot | 0:9.20.26-0.1.hum1 |
| Red Hat hummingbird 1 | bind-devel | 0:9.20.26-0.1.hum1 |
| Red Hat hummingbird 1 | bind-dnssec-utils | 0:9.20.26-0.1.hum1 |
| Red Hat hummingbird 1 | bind-doc | 0:9.20.26-0.1.hum1 |
| Red Hat hummingbird 1 | bind-libs | 0:9.20.26-0.1.hum1 |
| Red Hat hummingbird 1 | bind-utils | 0:9.20.26-0.1.hum1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | bind | 9.20.26-150700.3.29.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | bind | 9.20.26-150700.3.29.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | bind | 9.18.50-150600.3.32.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | bind | 9.18.50-150600.3.32.1 |
| Ubuntu 18.04 LTS | isc-dhcp | no fix |
| Ubuntu 20.04 LTS | bind9-libs | no fix |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.5 |
| Ubuntu 22.04 LTS | bind9-libs | no fix |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.6 |
| Ubuntu 24.04 LTS | isc-dhcp | no fix |
| Ubuntu 26.04 LTS | bind9 | 1:9.20.24-1ubuntu0.2 |
| Ubuntu 26.04 LTS | isc-dhcp | no fix |
| openSUSE Leap 16.0 | bind | 9.20.26-160000.1.1 |
| openSUSE Tumbleweed | bind | 9.20.26-1.1 |