Vulnerability DatabaseCVE-2022-40188
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CVE-2022-40188
Published:September 23, 2022
Updated:July 21, 2026
Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.
Related Resources (12)
https://lists.debian.org/debian-lts-announce/2022/10/msg00008.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XO6LIVQS62MI5GG4OVYB5RHVZMYNHAHG/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO6LIVQS62MI5GG4OVYB5RHVZMYNHAHG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HIMDNIUI7GTUEKIBBYYW7OCTJQFPDNXL/
https://security-tracker.debian.org/tracker/CVE-2022-40188
https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343#note_262558
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIMDNIUI7GTUEKIBBYYW7OCTJQFPDNXL/
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-40188
https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/40xxx/CVE-2022-40188.json
https://nvd.nist.gov/vuln/detail/CVE-2022-40188
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S2VE5K3VDUHJOIA2IGT3G5R76IBADMNE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2VE5K3VDUHJOIA2IGT3G5R76IBADMNE/
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Algorithmic Complexity
CWE-407
EPSS
Base Score:
1.52