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netavark has incorrect error handling for malformed tcp packets

Moderate severity GitHub Reviewed Published Apr 7, 2026 in containers/aardvark-dns • Updated Apr 8, 2026

Package

cargo netavark (Rust)

Affected versions

>= 1.16.0, <= 1.17.0

Patched versions

1.17.1

Description

Impact

A truncated TCP DNS query followed by a connection reset causes aardvark-dns to enter an unrecoverable infinite error loop at 100% CPU.

Patches

containers/aardvark-dns@3b49ea7

Workarounds

None

Credits

Thanks to @dkane01 for reporting this

References

@Luap99 Luap99 published to containers/aardvark-dns Apr 7, 2026
Published to the GitHub Advisory Database Apr 7, 2026
Reviewed Apr 7, 2026
Published by the National Vulnerability Database Apr 7, 2026
Last updated Apr 8, 2026

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

Weaknesses

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource. Learn more on MITRE.

CVE ID

CVE-2026-35406

GHSA ID

GHSA-hfpq-x728-986j

Source code

Credits

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