CVE-2026-35406
Infinite Loop CPU Exhaustion in Aardvark-dns TCP Queries
Publication date: 2026-04-07
Last updated on: 2026-04-16
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| containers | aardvark-dns | From 1.16.0 (inc) to 1.17.1 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-835 | The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. |
| CWE-400 | The product does not properly control the allocation and maintenance of a limited resource. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects aardvark-dns, an authoritative DNS server for A/AAAA container records. Specifically, versions from 1.16.0 to 1.17.0 are impacted. When a truncated TCP DNS query is followed by a connection reset, the server enters an unrecoverable infinite error loop that consumes 100% CPU.
This issue was fixed in version 1.17.1 of aardvark-dns.
How can this vulnerability impact me? :
The vulnerability can cause the aardvark-dns server to enter an infinite error loop, resulting in 100% CPU usage. This can lead to denial of service as the server becomes unresponsive or unable to process legitimate DNS queries.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, upgrade aardvark-dns to version 1.17.1 or later, where the issue is fixed.