High severity · published Apr 7, 2026
CVE-2026-35406
Aardvark-dns has incorrect error handling for malformed tcp packets
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
aardvark-dns · containers
>= 1.16.0, < 1.17.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35406
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35406
Patch
https://github.com/containers/aardvark-dns/commit/3b49ea7b38bdea134b7f03256f2e13f44ce73bb1
Release Notes
https://github.com/containers/aardvark-dns/releases/tag/v1.17.1
Patch
https://github.com/containers/aardvark-dns/security/advisories/GHSA-hfpq-x728-986j
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Containers/aardvark-dns: tcp query handling flaw in aardvark-dns leading to denial of service