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Fedora 44 dnsdist Update 2026-519446405a DoS Risk Mitigation

fedora
Calendar Grey April 25, 2026
Dist Fedora Esm H88
Upgrade dnsdist in Fedora 44 to mitigate identified threats for improved security and performance.
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 denial of service fedora update information dnsdist

Change Log

* Wed Apr 1 2026 Sander Hoentjen - 2.0.3-1 - Update to new upstream - Fixes #2453419 (CVE-2026-27854) - Fixes #2453421 (CVE-2026-27853) - Fixes #2453426 (CVE-2026-24030) - Fixes #2453427 (CVE-2026-0397) - Fixes #2453429 (CVE-2026-24029) - Fixes #2453430 (CVE-2026-0396) - Fixes #2453431 (CVE-2026-24028)

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-2026-519446405a' 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
critical
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Name: dnsdist
Product: Fedora 44
Version: 2.0.3
Release: 1.fc44
URL: https://dnsdist.org
Summary: Highly DNS-, DoS- and abuse-aware loadbalancer

Topics%20covered

Topics Covered

security advisory denial of service fedora update information dnsdist

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