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Debian dnsdist Important Security Advisory DSA-6367-1 for Denial of Service

debian
Calendar Grey June 25, 2026
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Security vulnerabilities fixed in dnsdist for Debian trixie to prevent issues like denial of service and information leaks.
Multiple security vulnerabilities were discovered in the dnsdist DNS loadbalancer, which could result in denial of service, information disclosure or bypass of security rules
Topics%20covered

Topics Covered

security advisory denial of service debian important information disclosure dnsdist

Summary

For the stable distribution (trixie), these problems have been fixed in
version 1.9.15-0+deb13u1.

We recommend that you upgrade your dnsdist packages.

For the detailed security status of dnsdist please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/dnsdist

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/



Severity
important
Lowest
Low
Medium
High
Critical

Package: dnsdist
CVE ID: CVE-2026-40011 CVE-2026-40208 CVE-2026-40209

Topics%20covered

Topics Covered

security advisory denial of service debian important information disclosure dnsdist

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