Aardvark-dns has incorrect error handling for malformed tcp packets
Priority LOW 33CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00398 34th percentileScored 2026-11-07
Fix Partial aardvark-dns (containers): 1.17.1netavark (crates.io): 1.17.1Red Hat: 3 advisoriesRed Hat: 3 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| containers | aardvark-dns | 1.16.0 to before 1.17.1 | 1.17.1 | Patch available | CNA |
| — | netavark (crates.io) | 1.16.0 to before 1.17.1 | 1.17.1 | Patch available | GHSA-hfpq-x728-986j |
- aardvark-dns Vendorcontainers Affected 1.16.0 to before 1.17.1 Fixed in 1.17.1 Patch available CNA
- netavark (crates.io) Vendor— Affected 1.16.0 to before 1.17.1 Fixed in 1.17.1 Patch available GHSA-hfpq-x728-986j
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:containers:aardvark-dns:*:*:*:*:*:*:*:* | 1.16.0 to before 1.17.1 | Vulnerable | containers |
- cpe:2.3:a:containers:aardvark-dns:*:*:*:*:*:*:*:* Versions 1.16.0 to before 1.17.1 Vulnerable ·containers
Remediation
- Fix · CNA aardvark-dns (containers) Fixed in 1.17.1
- Fix · GHSA-hfpq-x728-986j netavark (crates.io) Fixed in 1.17.1 Advisory →
Red Hat 3 advisories
- RHSA-2026:56999 Released 2026-08-19 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images aardvark-dns-2:2.1.0-1.hum1@aarch64, aardvark-dns-2:2.1.0-1.hum1@src, aardvark-dns-2:2.1.0-1.hum1@x86_64 +2
- RHSA-2026:36782 Released 2026-07-08 · Red Hat rating Moderateaardvark-dns security update
- Red Hat Enterprise Linux AppStream (v. 10) aardvark-dns-2:1.17.1-1.el10_2
- RHSA-2026:36318 Released 2026-07-07 · Red Hat rating Moderateaardvark-dns security update
- Red Hat Enterprise Linux AppStream (v. 9) aardvark-dns-2:1.17.1-1.el9_8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:36782 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:36318 |
| Red Hat Hardened Images | Fixed | RHSA-2026:56999 |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-35406
- 2026-10-03 Alias added: GHSA-hfpq-x728-986j
References
Patch 2
More containers Aardvark-dns vulnerabilities
- TI-2024-07805 Containers/aardvark-dns: tcp query handling flaw in aardvark-dns leading to denial of service CVSS 3.1HIGH 7.5
Sources
- CVE-2026-35406 · CVE Program
- CVE-2026-35406 · NVD
- FIRST EPSS
- GHSA-hfpq-x728-986j · GitHub Advisory Database · CC BY 4.0
- CVE-2026-35406 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences