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CVE-2026-35406VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-35406· Medium 6.2

Not known to be exploited · CVSS 6.2 Medium : upgrade Red Hat aardvark-dns to 1.17.1 when convenient.

Data as of 29 Oct 2026, 12:49 UTC

CVSS 3.1 base score
6.2Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.17.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade aardvark-dns and containers/aardvark-dns to 1.17.1.

Affected software

ProductAffectedFixed in
containersaardvark-dnsAffected
  • >=1.16.0 <1.17.1
Fixed in
  • 1.17.1
GitHubcontainers/aardvark-dnspkg:github/containers/aardvark-dnsOther threatsAffected
  • <1.17.1 >=1.16.0
Fixed in
  • 1.17.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat recommends mitigating this issue by avoiding the use of aardvark-dns when container name resolution is not required. This can be achieved by creating Podman networks with DNS disabled (e.g., using 'podman network create --disable-dns'), which prevents the vulnerable component from being used.

Description

A vulnerability in aardvark-dns allows a specially crafted TCP DNS query followed by a connection reset to trigger an infinite error loop, causing 100% CPU usage and denial of service. This component is accessible only via internal Podman networks, so exploitation requires local container network access. Mitigation involves disabling DNS in Podman networks if container name resolution is not needed.

References

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