CVE catalog
CVE-2022-40188
knot-resolver: CVE-2022-40188
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.95% · Oct 25, 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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | knot-resolver | sid | 6.5.0-2 | fixed |
| Debian | knot-resolver | forky | 6.4.2-1 | fixed |
| Debian | knot-resolver | trixie | 5.7.5-1 | fixed |
| Debian | knot-resolver | bookworm | 5.6.0-1+deb12u1 | fixed |
| Debian | knot-resolver | bookworm-security | 5.6.0-1+deb12u1 | fixed |
| Ubuntu | knot-resolver | pro | 5.3.1-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.2-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.3-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.4-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.4-1ubuntu0.1~esm1 | fixed |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu1 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2.1 | fixed |
| Ubuntu | knot-resolver | pro | 5.3.1-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.2-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.3-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.4-1 | vulnerable |
| Ubuntu | knot-resolver | pro | 5.4.4-1ubuntu0.1~esm1 | fixed |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu1 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2 | vulnerable |
| Ubuntu | knot-resolver | 20.04 | 3.2.1-3ubuntu2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | knot-resolver | source | sid | 5.5.3-1 | not yet assigned | Not reported | Not reported |
| Debian | knot-resolver | source | forky | 5.5.3-1 | not yet assigned | Not reported | Not reported |
| Debian | knot-resolver | source | trixie | 5.5.3-1 | not yet assigned | Not reported | Not reported |
| Debian | knot-resolver | source | bookworm | 5.5.3-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | knot-resolver | deb | pro | 5.4.4-1ubuntu0.1~esm1 | Not reported | USN-6225-1 | Not reported |
| Ubuntu | knot-resolver | deb | 20.04 | 3.2.1-3ubuntu2.1 | Not reported | USN-6225-1 | Not reported |
| Ubuntu | knot-resolver | deb | pro | 5.4.4-1ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2022-40188 | Not reported |
| Ubuntu | knot-resolver | deb | 20.04 | 3.2.1-3ubuntu2.1 | Not reported | UBUNTU-CVE-2022-40188 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [knot-resolver]Fixed
Details (4)
5.6.0-1+deb12u1· amd64 · bookwormFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· arm64 · bookwormFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· amd64 · bookworm-securityFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· arm64 · bookworm-securityFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
- [knot-resolver-doc]Fixed
Source package: [knot-resolver]
Details (4)
5.6.0-1+deb12u1· all · bookwormFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· all · bookwormFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· all · bookworm-securityFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· all · bookworm-securityFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
- [knot-resolver-module-http]Fixed
Source package: [knot-resolver]
Details (4)
5.6.0-1+deb12u1· amd64 · bookwormFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· arm64 · bookwormFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· amd64 · bookworm-securityFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
5.6.0-1+deb12u1· arm64 · bookworm-securityFixed · Fixed:
5.5.3-1dsa · knot-resolver · debian · bookworm
Observed: