CVE-2026-35406: Netavark Netavark Has Incorrect Error Handling Vulnerability

HIGH
Advisory Identifier: GHSA-hfpq-x728-986j
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CVSS 7.5
CWE-400 CWE-835
Published
Advisory Summary

CVE-2026-35406 is a HIGH (CVSS 7.5) netavark has incorrect error handling vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Netavark libraries in the crates.io ecosystem. The issue involves netavark has incorrect error handling for malformed tcp packets. Remediation is available by upgrading affected packages to version 1.17.1.

CVE-2026-35406 at a Glance

CVE Identifier CVE-2026-35406
GHSA Identifier GHSA-hfpq-x728-986j
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Netavark
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-35406

To remediate this vulnerability, upgrade all affected Netavark dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

netavark fixed: 1.17.1 
Upgrade netavark to 1.17.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for netavark

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-35406, inspect your project dependencies for Netavark:

inspect dependencies for netavark

Analyze the terminal output to locate any version of Netavark in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.17.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Netavark, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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 https://github.com/containers/aardvark-dns/commit/3b49ea7b38bdea134b7f03256f2e13f44ce73bb1 ### Workarounds None ### Credits Thanks to @dkane01 for reporting this

CVE-2026-35406 Affected Netavark Versions

1 component(s)
Fixed Versions:
1.17.1
Product / Package Ecosystem Affected Versions Fixed Version
netavark
 crates.io
≥ 1.16.0
< 1.17.1
1.17.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/containers/aardvark-dns/security/advisories/GHSA-hfpq-x728-986j
NVD — CVE-2026-35406 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35406
Security Fix Commit FIX COMMIT
https://github.com/containers/aardvark-dns/commit/3b49ea7b38bdea134b7f03256f2e13f44ce73bb1
Netavark Source Repository REPOSITORY
https://github.com/containers/aardvark-dns
Netavark Release RELEASE
https://github.com/containers/aardvark-dns/releases/tag/v1.17.1

Frequently Asked Questions

What is CVE-2026-35406?
CVE-2026-35406 is a security vulnerability in Netavark involving netavark has incorrect error handling for malformed tcp packets under CWE-400: Uncontrolled Resource Consumption.
Which Netavark versions are affected?
Affected versions include releases prior to 1.17.1 across affected packages: netavark.
What version fixes CVE-2026-35406?
Upgrading to 1.17.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is netavark affected?
Yes, netavark is affected in releases prior to 1.17.1. Upgrade your dependency to 1.17.1 or later.
What is the CVSS score of CVE-2026-35406?
CVE-2026-35406 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-35406?
CVE-2026-35406 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check crates.io dependencies for CVE-2026-35406?
Run the dependency tree command: 'inspect dependencies for netavark'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hfpq-x728-986j",
  "modified" : "2026-04-24T13:44:30Z",
  "published" : "2026-04-07T20:13:04Z",
  "aliases" : [ "CVE-2026-35406" ],
  "summary" : "netavark has incorrect error handling for malformed tcp packets",
  "details" : "### Impact\n\nA truncated TCP DNS query followed by a connection reset causes aardvark-dns to enter an unrecoverable infinite error loop at 100% CPU.\n\n### Patches\nhttps://github.com/containers/aardvark-dns/commit/3b49ea7b38bdea134b7f03256f2e13f44ce73bb1\n\n### Workarounds\nNone\n\n### Credits\n\nThanks to @dkane01 for reporting this",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "netavark"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.16.0"
      }, {
        "fixed" : "1.17.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.17.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/containers/aardvark-dns/security/advisories/GHSA-hfpq-x728-986j"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-35406"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/aardvark-dns/commit/3b49ea7b38bdea134b7f03256f2e13f44ce73bb1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/containers/aardvark-dns"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/aardvark-dns/releases/tag/v1.17.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-07T20:13:04Z",
    "nvd_published_at" : "2026-04-07T22:16:23Z"
  }
}