# CVE-2026-35406: aardvark-dns: Aardvark-dns is an authoritative dns server for A/AAAA container records

CVE-2026-35406 is fixed in aardvark-dns on 1 platform, first by RHSA-2026:36782, released April 7, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-35406
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 7, 2026

## Description

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 fixed in 1.17.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | aardvark-dns Debian 14 | 1.16.0-3 | [DEBIAN-CVE-2026-35406](https://patchblox.com/security/data/fix/linux/debian-cve-2026-35406.md) | Apr 7, 2026 |
| Linux | aardvark-dns RHEL 10 | 1.17.1-1.el10_2 | [RHSA-2026:36782](https://patchblox.com/security/data/fix/linux/rhsa-2026-36782.md) | Apr 7, 2026 |
| Linux | aardvark-dns RHEL 9 | 2:1.17.1-1.el9_8 | [RHSA-2026:36318](https://patchblox.com/security/data/fix/linux/rhsa-2026-36318.md) | Jul 8, 2026 |
| Linux | aardvark-dns almalinux 10 | 2:1.17.1-1.el10_2 | [ALSA-2026:36782](https://patchblox.com/security/data/fix/linux/alsa-2026-36782.md) | Jul 8, 2026 |
| Linux | aardvark-dns almalinux 9 | 2:1.17.1-1.el9_8 | [ALSA-2026:36318](https://patchblox.com/security/data/fix/linux/alsa-2026-36318.md) | Jul 7, 2026 |
| Linux | aardvark-dns ol 10 | 2:1.17.1-1.el10_2 | [ELSA-2026-36782](https://patchblox.com/security/data/fix/linux/elsa-2026-36782.md) | Jul 16, 2026 |
| Linux | aardvark-dns ol 9 | 2:1.17.1-1.el9_8 | [ELSA-2026-36318](https://patchblox.com/security/data/fix/linux/elsa-2026-36318.md) | Jul 7, 2026 |
| Linux | aardvark-dns rocky 10 | 2:1.17.1-1.el10_2 | [RLSA-2026:36782](https://patchblox.com/security/data/fix/linux/rlsa-2026-36782.md) | Jul 10, 2026 |
| Linux | aardvark-dns rocky 9 | 2:1.17.1-1.el9_8 | [RLSA-2026:36318](https://patchblox.com/security/data/fix/linux/rlsa-2026-36318.md) | Jul 8, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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