What’s Vulnerable › Vulnerabilities

CVE-2023-46317

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-22 · updated 2026-06-17

Description

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

Affected products

• CZ.NIC knot-resolver: before 5.7.0 — fixed in 5.7.0

How to fix

Upgrade to a fixed version: CZ.NIC knot-resolver 5.7.0. Check the vendor advisory for mitigations.

References

• https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1448
• https://www.knot-resolver.cz/2023-08-22-knot-resolver-5.7.0.html
• https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1448
• https://www.knot-resolver.cz/2023-08-22-knot-resolver-5.7.0.html

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