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Fedora 42 dnsdist DoS Issues Fixed with Advisory 2026-637c11815f

fedora
Calendar Grey April 10, 2026
Dist Fedora Esm H88
Update dnsdist on Fedora 42 addresses multiple DoS issues with CVE fixes making it a priority for your system.
Update to latest upstream

Summary

dnsdist is a highly DNS-, DoS- and abuse-aware loadbalancer. Its goal in life

is to route traffic to the best server, delivering top performance to

legitimate users while shunting or blocking abusive traffic.

Update Information:

Update to latest upstream

Topics%20covered

Topics Covered

security advisory fedora update DoS information dnsdist

Change Log

* Wed Apr 1 2026 Sander Hoentjen - 1.9.12-1 - Update to 1.9.12 - Fixes CVE-2026-0396, CVE-2026-0397, CVE-2026-24028, CVE-2026-24029, CVE-2026-24030, CVE-2026-27853, CVE-2026-27854

References


[ 1 ] Bug #2419176 - dnsdist-2.0.3 is available https://bugzilla.redhat.com/show_bug.cgi?id=2419176 [ 2 ] Bug #2453419 - CVE-2026-27854 dnsdist: DNSdist: Denial of Service due to use-after-free vulnerability in Lua [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2453419 [ 3 ] Bug #2453421 - CVE-2026-27853 dnsdist: dnsdist: Denial of Service via crafted DNS responses [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2453421 [ 4 ] Bug #2453426 - CVE-2026-24030 dnsdist: DNSdist: Denial of Service via excessive memory allocation from DNS over QUIC or HTTP/3 payloads [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2453426 [ 5 ] Bug #2453427 - CVE-2026-0397 dnsdist: dnsdist and PowerDNS: Information Disclosure via Cross-Origin Resource Sharing (CORS) Misconfiguration [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2453427 [ 6 ] Bug #2453429 - CVE-2026-24029 dnsdist: dnsdist: Access Control List...

Read the Full Advisory

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-637c11815f' 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

Severity
important
Lowest
Low
Medium
High
Critical

Name: dnsdist
Product: Fedora 42
Version: 1.9.12
Release: 1.fc42
URL: https://www.dnsdist.org/index.html
Summary: Highly DNS-, DoS- and abuse-aware loadbalancer

Topics%20covered

Topics Covered

security advisory fedora update DoS information dnsdist

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