# CVE-2024-8418: Containers/aardvark-dns: tcp query handling flaw in aardvark-dns leading to denial of service

Status: published. Published: 2024-09-04. Updated: 2026-11-05.

A flaw was found in Aardvark-dns, which is vulnerable to a Denial of Service attack due to the serial processing of TCP DNS queries. An attacker can exploit this flaw by keeping a TCP connection open indefinitely, causing the server to become unresponsive and resulting in other DNS queries timing out. This issue prevents legitimate users from accessing DNS services, thereby disrupting normal operations and causing service downtime.

## Remediation

- workaround: It is advised to upgrade aardvark-dns to version 1.12.1 or higher. (source: CNA: redhat)

## Affected products and versions

-  /  (containers/aardvark-dns): 1.12.0 (affected, semver); 1.12.1 (affected, semver). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (aardvark-dns): ≥ 2:1.14.0-1.el9; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (aardvark-dns): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (container-tools:rhel8/aardvark-dns): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (container-tools:rhel8/containers-common): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (containers-common): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.81% as of 2026-11-05; percentile 56.98%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-400

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2025:7094 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2024-8418 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2309683 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://github.com/containers/aardvark-dns/issues/500 (CNA: redhat)

- https://github.com/containers/aardvark-dns/pull/503 (CNA: redhat)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-8418; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-8418; retrieved 2026-11-05; source updated Not reported

Revision: d0d51aa2ba8fa00f488e8eb076eb4fc9cc0ebacaf2d54750d35dc16490cb2c8f

Canonical: https://y2.dev/cve/CVE-2024-8418

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