Fedora 43 dnsdist Critical DoS Fixes CVE-2026-27854 2026-6cae4711b3
fedora
April 10, 2026
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 Covered
Change Log
* Wed Apr 1 2026 Sander Hoentjen
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...
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-6cae4711b3' 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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Severity
critical
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Critical
Name: dnsdist
Product: Fedora 43
Version: 2.0.3
Release: 1.fc43
URL: https://dnsdist.org
Summary: Highly DNS-, DoS- and abuse-aware loadbalancer
Topics Covered
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