What is CVE-2023-46317?

CVE-2023-46317 is a high-severity vulnerability in Nic Knot Resolver. CVSS score: 7.5/10. Published 2023-10-22.

How severe is CVE-2023-46317?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Nic Knot Resolver

CVE-2023-46317

Knot Resolver before 5.7.0 performs many TCP reconnections upon receiving certain nonsensical responses from servers.

Published 2023-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.7th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: -0.000

Affected products

Nic Knot Resolver

References

www.knot-resolver.cz/2023-08-22-knot-resolver-5.7.0.html (Release Notes)
gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1448 (Patch, Release Notes)

Frequently asked questions

What is CVE-2023-46317?: CVE-2023-46317 is a high-severity vulnerability in Nic Knot Resolver. CVSS score: 7.5/10. Published 2023-10-22.
How severe is CVE-2023-46317?: High severity. CVSS v3 base score is 7.5 out of 10.