New BIND 9 releases: 9.20.29, 9.21.26

[Suzanne Goldlust]

Our September 2026 maintenance releases of BIND 9 are available and can be downloaded from the links below.  Packages and container images provided by ISC will be updated later today.

In addition to bug fixes and feature improvements, these releases also contain fixes for security vulnerabilities.  More information can be found in the following Security Advisories:

    https://kb.isc.org/docs/cve-2026-19033
    https://kb.isc.org/docs/cve-2026-19662
    https://kb.isc.org/docs/cve-2026-19666
    https://kb.isc.org/docs/cve-2026-19667
    https://kb.isc.org/docs/cve-2026-19668
    https://kb.isc.org/docs/cve-2026-19941
    https://kb.isc.org/docs/cve-2026-75029
    https://kb.isc.org/docs/cve-2026-76163
    https://kb.isc.org/docs/cve-2026-77119
    https://kb.isc.org/docs/cve-2026-77692
    https://kb.isc.org/docs/cve-2026-78301
    https://kb.isc.org/docs/cve-2026-80274
    https://kb.isc.org/docs/cve-2026-81563
    https://kb.isc.org/docs/cve-2026-81736

A link to each newly-released version follows.  Each release directory includes a complete source tarball, cryptographic signature, and release notes.  The release notes provide a summary of significant changes, and should be reviewed before upgrading.

  - Current supported stable branch:

    - 9.20.29  - https://downloads.isc.org/isc/bind9/9.20.29/

  - Experimental development branch:

    - 9.21.26  - https://downloads.isc.org/isc/bind9/9.21.26/

For more information and other release formats, consult the ISC software download page: https://www.isc.org/download/

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As a reminder, BIND’s supported platforms are listed in the ARM (https://bind9.readthedocs.io/en/stable/chapter2.html#supported-platforms) and in this knowledgebase article (https://kb.isc.org/docs/supported-platforms).

Thank you for using ISC’s software.