CVE-2022-40188

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.94% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 79.6% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2022-09-23 00:00Z4 YR AGO

Last updated

2025-05-27 14:55Z1 YR AGO

Reserved

2022-09-08

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-407Inefficient Algorithmic ComplexityClass

Data version

5.1

Document digest

12ae83b7b8845028b766478c5034d2b43e96c8cf710e1227cd54529adb09bd6b

• gitlab.nic.czhttps://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1343#note_262558
• lists.fedoraproject.orgFEDORA-2022-68ad89b21chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S2VE5K3VDUHJOIA2IGT3G5R76IBADMNE/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-357cc1a81bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIMDNIUI7GTUEKIBBYYW7OCTJQFPDNXL/vendor-advisory
• lists.fedoraproject.orgFEDORA-2022-2a4ca7b18dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XO6LIVQS62MI5GG4OVYB5RHVZMYNHAHG/vendor-advisory
• lists.debian.org[debian-lts-announce] 20221008 [SECURITY] [DLA 3139-1] knot-resolver security updatehttps://lists.debian.org/debian-lts-announce/2022/10/msg00008.htmlmailing-list