# libnet-cidr-perl security updates

Patch Radar has 6 security fixes for libnet-cidr-perl, closing 1 CVE. The newest security fix is DEBIAN-CVE-2021-4456 (0.25-1), released February 27, 2026.

- Web page: https://patchblox.com/security/product/linux/libnet-cidr-perl
- Platform: Linux
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| [DEBIAN-CVE-2021-4456](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4456.md) | Feb 27, 2026 | Debian 13.5 (trixie) 0.25-1 | Routine | 1 | 0 |
| [DEBIAN-CVE-2021-4456](https://patchblox.com/security/data/fix/linux/debian-cve-2021-4456.md) | Feb 27, 2026 | Debian 14 0.25-1 | Routine | 1 | 0 |
| [libnet-cidr-perl 0.18-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libnet-cidr-perl-0.18-1ubuntu0.1-esm2.md) | Feb 26, 2026 | Ubuntu 18.04.6 LTS (bionic) 0.18-1ubuntu0.1~esm2 | Routine | 1 | 0 |
| [libnet-cidr-perl 0.20-1ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libnet-cidr-perl-0.20-1ubuntu0.1-esm2.md) | Feb 26, 2026 | Ubuntu 20.04 LTS (focal) 0.20-1ubuntu0.1~esm2 | Routine | 1 | 0 |
| [libnet-cidr-perl 0.21-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libnet-cidr-perl-0.21-1ubuntu0.2.md) | Feb 26, 2026 | Ubuntu 22.04.1 LTS (jammy) 0.21-1ubuntu0.2 | Routine | 1 | 0 |
| [libnet-cidr-perl 0.21-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnet-cidr-perl-0.21-2ubuntu0.2.md) | Feb 26, 2026 | Ubuntu 24.04.5 LTS (noble) 0.21-2ubuntu0.2 | Routine | 1 | 0 |

---

Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.