Skip to content
OpenAdvisories
Medium ALSA-2026:36782 1 CVE

Moderate: aardvark-dns security update

Published Jul 8, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

Authoritative DNS server for A/AAAA container records Forwards other request to configured resolvers. Read more about configuration in `src/backend/mod.rs`.

Security Fix(es):

* aardvark-dns: Aardvark-dns: Denial of Service via truncated TCP DNS query and connection reset (CVE-2026-35406)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 1

ReleasePackageFixed in
AlmaLinux · 10 aardvark-dns 2:1.17.1-1.el10_2

Vulnerabilities 1

  • Medium 6.2
    CVE-2026-35406

    Aardvark-dns has incorrect error handling for malformed tcp packets

    Aardvark-dns is an authoritative dns server for A/AAAA container records. From 1.16.0 to 1.17.0, a truncated TCP DNS query followed by a connection reset causes aardvark-dns to enter an unrecoverable infinite error loop at 100% CPU. This vulnerability is fixe…

    containers aardvark-dns aardvark-dns netavark Debian Ubuntu Alpine crates.io

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-35406
  • report
    https://bugzilla.redhat.com/2456280
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-36782.html