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Fencer Intel
medium 6.2

CVE-2026-35406 json

Aardvark-dns has incorrect error handling for malformed tcp packets

published 7mo ago modified 3mo ago also EUVD-2026-19972 , GHSA-hfpq-x728-986j

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

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.

Patch / fix

  • crates.io netavark 1.17.1
  • containers aardvark-dns 1.17.1
  • aardvark-dns Debian 14 1.16.0-3

debian advisories DEBIAN-CVE-2026-35406

  • aardvark-dns hummingbird 1 2.1.0-1.hum1
  • aardvark-dns-tests hummingbird 1 2.1.0-1.hum1
  • aardvark-dns RHEL 10.2 2:1.17.1-1.el10_2
  • aardvark-dns RHEL 9 2:1.17.1-1.el9_8

red hat advisories RHSA-2026:56999RHSA-2026:36782RHSA-2026:36318

  • aardvark-dns openSUSE Tumbleweed 1.17.1-1.1

opensuse advisories openSUSE-SU-2026:10570-1

  • aardvark-dns AlmaLinux 10 2:1.17.1-1.el10_2
  • aardvark-dns AlmaLinux 9 2:1.17.1-1.el9_8

almalinux advisories ALSA-2026:36782ALSA-2026:36318

  • aardvark-dns Rocky Linux 10 2:1.17.1-1.el10_2
  • aardvark-dns Rocky Linux 9 2:1.17.1-1.el9_8

rocky linux advisories RLSA-2026:36782RLSA-2026:36318

  • aardvark-dns Alpine 3.24 1.17.1-r0

alpine advisories ALPINE-CVE-2026-35406

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-35406 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-35406 updated cvss 6.5

aardvark-dns: Aardvark-dns: Denial of Service via truncated TCP DNS query and connection reset

  • Red Hat Enterprise Linux 8 aardvark-dns
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) aardvark-dns 1.17.1-1.el9_8
    fixed: vendor fix RHSA-2026:36318
  • Red Hat Enterprise Linux AppStream (v. 10) aardvark-dns 1.17.1-1.el10_2
    fixed: vendor fix RHSA-2026:36782
  • Red Hat Hardened Images aardvark-dns 2.1.0-1.hum1, aardvark-dns-tests 2.1.0-1.hum1
    fixed: vendor fix RHSA-2026:56999
  • Red Hat Enterprise Linux 8 netavark, containers-common Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
crates.io netavark
>=1.16.0, <1.17.1
1.17.1

Affected products

  • containers aardvark-dns

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.