Record ordering based unexpected exit with CNAME or DNAME
CVE-2026-12617 is fixed in 20 products on 1 platform, first by bind9 1:9.20.24-1ubuntu0.2, released July 22, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bind · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind · opensuse-leap 16.0 | 9.20.26-160000.1.1 | OPENSUSE-SU-2026:21489-1 | Jul 30, 2026 |
| bind · sles 15.6 | 9.18.50-150600.3.32.1 | SUSE-SU-2026:3452-1 | Aug 3, 2026 |
| bind · sles 15.7 | 9.20.26-150700.3.29.1 | SUSE-SU-2026:3426-1 | Jul 30, 2026 |
| bind-chroot · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-debugsource · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-devel · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-dnssec-utils · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-dnssec-utils-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-doc · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-libs · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-libs-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-license · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-utils · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind-utils-debuginfo · amzn 2023 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 | Aug 3, 2026 |
| bind9 · Debian 12.15 (bookworm) | 1:9.18.49-1~deb12u2 | DEBIAN-CVE-2026-12617 | Jul 23, 2026 |
| bind9 · Debian 13.5 (trixie) | 1:9.20.26-1~deb13u1 | DEBIAN-CVE-2026-12617 | Jul 23, 2026 |
| bind9 · Debian 14 | 1:9.20.26-1 | DEBIAN-CVE-2026-12617 | Jul 23, 2026 |
| bind9 · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | bind9 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| bind9 · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | bind9 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
| bind9 · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.2 | bind9 1:9.20.24-1ubuntu0.2 | Jul 22, 2026 |
| bind9-dnsutils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | bind9-dnsutils 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| bind9-dnsutils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | bind9-dnsutils 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
| bind9-dnsutils · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.2 | bind9-dnsutils 1:9.20.24-1ubuntu0.2 | Jul 22, 2026 |
| bind9-host · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | bind9-host 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| bind9-host · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | bind9-host 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
| bind9-host · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.2 | bind9-host 1:9.20.24-1ubuntu0.2 | Jul 22, 2026 |
| bind9-libs · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | bind9-libs 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| bind9-libs · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | bind9-libs 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
| bind9-libs · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.2 | bind9-libs 1:9.20.24-1ubuntu0.2 | Jul 22, 2026 |
| bind9-utils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | bind9-utils 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| bind9-utils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | bind9-utils 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
| bind9-utils · Ubuntu 26.04.1 LTS (resolute) | 1:9.20.24-1ubuntu0.2 | bind9-utils 1:9.20.24-1ubuntu0.2 | Jul 22, 2026 |
| bind9utils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | bind9utils 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| bind9utils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | bind9utils 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
| dnsutils · Ubuntu 22.04.1 LTS (jammy) | 1:9.18.39-0ubuntu0.22.04.5 | dnsutils 1:9.18.39-0ubuntu0.22.04.5 | Aug 20, 2026 |
| dnsutils · Ubuntu 24.04.5 LTS (noble) | 1:9.18.39-0ubuntu0.24.04.6 | dnsutils 1:9.18.39-0ubuntu0.24.04.6 | Aug 20, 2026 |
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