Description
If BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and may subsequently abort and exit.
BIND will first need to store a DNS record for a key (KEY, DNSKEY, etc.). That key must specify a PRIVATEDNS algorithm (253), and in the algorithm identifier, improperly give a length longer than the actual identifier data. The invalid identifier will be stored. If BIND later needs to render that record to text, it will use the invalid length during processing, leading to a consistency check failing.
This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.18.11-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ISC | BIND 9 | 9.18.0 – ≤ 9.18.50, 9.20.0 – ≤ 9.20.24, 9.21.0 – ≤ 9.21.23, 9.18.11-S1 – ≤ 9.18.50-S1, 9.20.9-S1 – ≤ 9.20.24-S1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bind9 | 1:9.20.26-1 | — |
| Debian 13 | bind9 | 1:9.20.26-1~deb13u1 | — |
| Debian 12 | bind9 | 1:9.18.49-1~deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | bind9 | 1:9.20.24-1ubuntu0.2 | USN-8929-1, USN-8648-1 |
| Ubuntu 26.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 24.04 LTS | bind9 | 1:9.18.39-0ubuntu0.24.04.6 | USN-8929-1, USN-8648-1 |
| Ubuntu 24.04 LTS | isc-dhcp | No fix yet | — |
| Ubuntu 22.04 LTS | bind9 | 1:9.18.39-0ubuntu0.22.04.5 | USN-8929-1, USN-8648-1 |
| Ubuntu 22.04 LTS | bind9-libs | No fix yet | — |
| Ubuntu 20.04 LTS | bind9-libs | No fix yet | — |
| Ubuntu 18.04 LTS | isc-dhcp | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | bind9 | 1:9.18.30-0ubuntu0.20.04.2+esm3 | USN-8929-1 |
| Ubuntu Pro 18.04 LTS | bind9 | 1:9.11.3+dfsg-1ubuntu1.19+esm6 | USN-8929-1 |
| Ubuntu Pro 16.04 LTS | bind9 | 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11 | USN-8929-1 |
| Ubuntu Pro 14.04 LTS | bind9 | 1:9.9.5.dfsg-3ubuntu0.19+esm15 | USN-8929-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | bind +6 | 32:9.20.26-0.1.hum1 | RHSA-2026:54071 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | bind | 9.20.26-150700.3.29.1 | SUSE-SU-2026:3426-1 |
| SLES 15 SP6 | bind | 9.18.50-150600.3.32.1 | SUSE-SU-2026:3452-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | bind | 9.18.50-150600.3.32.1 | SUSE-SU-2026:3452-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | bind | 9.20.26-1.1 | openSUSE-SU-2026:11375-1 |
| openSUSE Leap 16.0 | bind | 9.20.26-160000.1.1 | openSUSE-SU-2026:21489-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | bind | 9.20.26-r0 | — |
| Alpine v3.23 | bind | 9.20.26-r0 | — |
| Alpine v3.22 | bind | 9.20.26-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | bind +7 | 32:9.18.50-1.amzn2023.0.2 | ALAS2023-2026-2040 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | bind | 9.20.26-1 | — |
Advisories 10
- RHSA-2026:54071 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-2484 Internet Systems Consortium BIND: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 5, 2026
- USN-8929-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Oct 17, 2026
- WID-SEC-2026-3038 Meinberg LANTIME: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 26, 2026
- USN-8648-1 bind9 vulnerabilities Ubuntu Security Notices (USN) · Aug 19, 2026
- SUSE-SU-2026:3452-1 Security update for bind SUSE / openSUSE Security Updates · Aug 4, 2026
- ALAS2023-2026-2040 Important: bind security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- openSUSE-SU-2026:21489-1 Security update for bind SUSE / openSUSE Security Updates · Jul 31, 2026
- SUSE-SU-2026:3426-1 Security update for bind SUSE / openSUSE Security Updates · Jul 31, 2026
- openSUSE-SU-2026:11375-1 bind-9.20.26-1.1 on GA media SUSE / openSUSE Security Updates · Jul 27, 2026
References
- CVE-2026-10822 vendor-advisory
- https://downloads.isc.org/isc/bind9/9.20.26 patch
- https://downloads.isc.org/isc/bind9/9.21.24 patch