CVE-2026-35406

Aardvark-dns has incorrect error handling for malformed tcp packets

State: Published
Severity: 6.2 Medium
Published: Apr 7, 2026
Updated: Apr 8, 2026
Reserved: Apr 2, 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.

Scores

CVSS	Score	Vector	Source
3.1	6.2 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
aardvark-dnscontainers	>= 1.16.0, < 1.17.1Affected

References

https://github.com/containers/aardvark-dns/security/advisories/GHSA-hfpq-x728-986j
https://github.com/containers/aardvark-dns/commit/3b49ea7b38bdea134b7f03256f2e13f44ce73bb1
https://github.com/containers/aardvark-dns/releases/tag/v1.17.1

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