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CVE-2016-6171
Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone…
- 8.6HighCVSS base score
- 2.8%Exploitation in 30 daysEPSS · top 13% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.
Timeline
ID reserved
By redhat
- 7 months later
· 7 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Affected products
n/a
- affected n/a
References
7
- [oss-security] 20160706 Malicious primary DNS servers can crash secondaries (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 91678 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- [dns-operations] 20160704 DNS activities in Japan (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20160706 Re: Malicious primary DNS servers can crash secondaries (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://gitlab.labs.nic.cz/labs/knot/issues/464 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/sischkg/xfer-limit/blob/master/README.md (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2016-7105 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-6171)Record last updated .