Ubuntu 4.x — End of Life
EOL Actively exploitedUbuntu 4.x reached end of life on Apr 30, 2006, 7465 days ago, and no longer receives security fixes. The most recent release in this series is 4.10. 1 CVE is tracked for this series, including 1 actively exploited according to CISA KEV. 1 of them was published after the end of life of the affected cycle and will not get an official patch. The next major version is Ubuntu 5. See Ubuntu 5 →
Ubuntu 4.x — All releases
| Version | Released | Active support | EOL date | Latest patch | Status | Alert me |
|---|---|---|---|---|---|---|
| 4.10 | Oct 26, 2004 | Oct 26, 2004 | Apr 30, 2006 | 4.10 | EOL |
CVEs affecting Ubuntu 4.x (1)
| CVE | Severity | CVSS | EPSS | KEV | Cycle | Description | Published |
|---|---|---|---|---|---|---|---|
| CVE-2026-31431 | HIGH | 7.8 | 3.43% | KEV | 4.10 | In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-pla… | Apr 22, 2026 |
Ubuntu 4.x is EOL — migrate to Ubuntu 5.x
Ubuntu 5.x is the next major release. Plan your upgrade before Ubuntu 4.x stops receiving security patches.
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[](https://eolcanary.com/explore/ubuntu/4)Frequently asked questions
Is Ubuntu 4 end of life?
Yes. All Ubuntu 4.x releases have reached end of life and no longer receive security patches. There are 1 known CVE affecting Ubuntu 4.x. Migrate to Ubuntu 5.x as soon as possible.
What CVEs affect Ubuntu 4?
There are 1 CVE tracked for Ubuntu 4.x and 1 listed in the CISA Known Exploited Vulnerabilities catalog. See the full list above with CVSS and EPSS scores.
What is the latest Ubuntu 4 version?
The latest Ubuntu 4.x patch release is 4.10, released on October 26, 2004. Always run the latest patch to benefit from all security fixes.
How to migrate from Ubuntu 4 to Ubuntu 5?
To migrate from Ubuntu 4 to Ubuntu 5: (1) review the official Ubuntu 5 migration guide for breaking changes, (2) update dependencies and configuration accordingly, (3) test thoroughly in a staging environment, (4) deploy with a rollback plan. Starting early gives you time to resolve compatibility issues before your current version reaches end of life.
Is it safe to run Ubuntu 4 in production?
No. Ubuntu 4 has reached end of life and security vulnerabilities are no longer patched. Critically, 1 CVE affecting Ubuntu 4.x is in the CISA KEV catalog — meaning it is actively exploited in the wild. Upgrade to a supported version immediately.
Data sourced from endoflife.date · CVE data from NVD · EPSS from FIRST.org · KEV from CISA