Vulnerability · Published Apr 7, 2026 · Assigned by GitHub_M
CVE-2026-35406Aardvark-dns has incorrect error handling for malformed tcp packets
Medium 6.2
In plain English
A medium-severity uncontrolled resource consumption in aardvark-dns from containers. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.4%top 65.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | aardvark-dns | 2:1.17.1-1.el10_2 | ALSA-2026:36782 |
| AlmaLinux:9 | aardvark-dns | 2:1.17.1-1.el9_8 | ALSA-2026:36318 |
| Alpine:v3.24 | aardvark-dns | 1.17.1-r0 | ALPINE-CVE-2026-35406 |
| Debian:14 | aardvark-dns | 1.16.0-3 | DEBIAN-CVE-2026-35406 |
| Rocky Linux:10 | aardvark-dns | 2:1.17.1-1.el10_2 | RLSA-2026:36782 |
| Rocky Linux:9 | aardvark-dns | 2:1.17.1-1.el9_8 | RLSA-2026:36318 |
| Ubuntu:24.04:LTS | aardvark-dns | no fix listed | UBUNTU-CVE-2026-35406 |
| Ubuntu:25.10 | aardvark-dns | no fix listed | UBUNTU-CVE-2026-35406 |
| Ubuntu:26.04:LTS | aardvark-dns | no fix listed | UBUNTU-CVE-2026-35406 |
| Ubuntu:26.10 | aardvark-dns | no fix listed | UBUNTU-CVE-2026-35406 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| containers | aardvark-dns | >= 1.16.0, < 1.17.1 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H