# knot-resolver security updates

Patch Radar has 20 security fixes for knot-resolver, closing 10 CVEs. The newest security fix is DEBIAN-CVE-2026-66374 (6.4.1-1), released July 26, 2026.

- Web page: https://patchblox.com/security/product/linux/knot-resolver
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [DEBIAN-CVE-2026-66374](https://patchblox.com/security/data/fix/linux/debian-cve-2026-66374.md) | Jul 26, 2026 | Debian 14 6.4.1-1 | High | 1 | 0 |
| [DSA-5633-1](https://patchblox.com/security/data/fix/linux/dsa-5633-1.md) | Feb 27, 2024 | Debian 12.15 (bookworm) 5.6.0-1+deb12u1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-50387](https://patchblox.com/security/data/fix/linux/debian-cve-2023-50387.md) | Feb 14, 2024 | Debian 12.15 (bookworm) 5.6.0-1+deb12u1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-50387](https://patchblox.com/security/data/fix/linux/debian-cve-2023-50387.md) | Feb 14, 2024 | Debian 13.5 (trixie) 5.7.1-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-50387](https://patchblox.com/security/data/fix/linux/debian-cve-2023-50387.md) | Feb 14, 2024 | Debian 14 5.7.1-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-50868](https://patchblox.com/security/data/fix/linux/debian-cve-2023-50868.md) | Feb 14, 2024 | Debian 12.15 (bookworm) 5.6.0-1+deb12u1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-50868](https://patchblox.com/security/data/fix/linux/debian-cve-2023-50868.md) | Feb 14, 2024 | Debian 13.5 (trixie) 5.7.1-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-50868](https://patchblox.com/security/data/fix/linux/debian-cve-2023-50868.md) | Feb 14, 2024 | Debian 14 5.7.1-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-46317](https://patchblox.com/security/data/fix/linux/debian-cve-2023-46317.md) | Oct 22, 2023 | Debian 13.5 (trixie) 5.7.0-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-46317](https://patchblox.com/security/data/fix/linux/debian-cve-2023-46317.md) | Oct 22, 2023 | Debian 14 5.7.0-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-26249](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26249.md) | Feb 21, 2023 | Debian 12.15 (bookworm) 5.6.0-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-26249](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26249.md) | Feb 21, 2023 | Debian 13.5 (trixie) 5.6.0-1 | High | 1 | 0 |
| [DEBIAN-CVE-2023-26249](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26249.md) | Feb 21, 2023 | Debian 14 5.6.0-1 | High | 1 | 0 |
| [DEBIAN-CVE-2022-40188](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40188.md) | Sep 23, 2022 | Debian 12.15 (bookworm) 5.5.3-1 | High | 1 | 0 |
| [DEBIAN-CVE-2022-40188](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40188.md) | Sep 23, 2022 | Debian 13.5 (trixie) 5.5.3-1 | High | 1 | 0 |
| [DEBIAN-CVE-2022-40188](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40188.md) | Sep 23, 2022 | Debian 14 5.5.3-1 | High | 1 | 0 |
| [knot-resolver 2.1.1-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-knot-resolver-2.1.1-1ubuntu0.1-esm2.md) | Sep 23, 2022 | Ubuntu 18.04.6 LTS (bionic) 2.1.1-1ubuntu0.1~esm2 | High | 1 | 0 |
| [knot-resolver 3.2.1-3ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-knot-resolver-3.2.1-3ubuntu2.1.md) | Sep 23, 2022 | Ubuntu 20.04 LTS (focal) 3.2.1-3ubuntu2.1 | High | 1 | 0 |
| [knot-resolver 5.4.4-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-knot-resolver-5.4.4-1ubuntu0.1-esm1.md) | Sep 23, 2022 | Ubuntu 22.04.1 LTS (jammy) 5.4.4-1ubuntu0.1~esm1 | High | 1 | 0 |
| [knot-resolver 3.2.1-3ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-knot-resolver-3.2.1-3ubuntu2.2.md) | May 19, 2020 | Ubuntu 20.04 LTS (focal) 3.2.1-3ubuntu2.2 | Routine | 4 | 0 |

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Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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