Fedora 43 Bind Critical Denial of Service Fix CVE-2026-1519 Advisory
fedora
March 29, 2026
Update to 9.18.47 (rhbz#2440561) Security Fixes: Fix unbounded NSEC3 iterations when validating referrals to unsigned delegations
Summary
BIND (Berkeley Internet Name Domain) is an implementation of the DNS
(Domain Name System) protocols. BIND includes a DNS server (named),
which resolves host names to IP addresses; a resolver library
(routines for applications to use when interfacing with DNS); and
tools for verifying that the DNS server is operating properly.
Update Information:
Update to 9.18.47 (rhbz#2440561) Security Fixes: Fix unbounded NSEC3 iterations when validating referrals to unsigned delegations. (CVE-2026-1519) Source: https://downloads.isc.org/isc/bind9/9.18.47/doc/arm/html/notes.html#notes-for- bind-9-18-47
Topics Covered
Change Log
* Wed Mar 25 2026 Petr Men\u0161k
References
[ 1 ] Bug #2440561 - bind-9.18.47 is available
https://bugzilla.redhat.com/show_bug.cgi?id=2440561
[ 2 ] Bug #2451360 - CVE-2026-1519 bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated zone [fedora-all]
https://bugzilla.redhat.com/show_bug.cgi?id=2451360
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-b2ec0d8a47' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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Name: bind
Product: Fedora 43
Version: 9.18.47
Release: 1.fc43
Summary: The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) server
Topics Covered
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