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Source-backed version compatibility

K3s Ubuntu Version Compatibility

K3s Ubuntu version compatibility. The support matrix certifies Ubuntu 26.04 and 24.04.

Full K3s matrixJSON data
4Version groups
13Documented constraints
2026-10-08Last verified

Quick answer

Ubuntu compatibility by K3s version

Supported and tested versions have compatibility evidence. Recommended and bundled versions describe upstream choices without establishing compatibility. Versions outside the documented coverage are unknown, not necessarily incompatible.

K3s version

1.37.1+k3s1

Supported Ubuntu versions

26.0424.04

The support matrix certifies Ubuntu 26.04 and 24.04.

high confidence · verified 2026-10-08 · certified operating system

K3s version

1.36.5+k3s1

Supported Ubuntu versions

26.0424.0422.04

The support matrix certifies Ubuntu 26.04, 24.04 and 22.04.

high confidence · verified 2026-10-08 · certified operating system

K3s version

1.35.9+k3s1

Supported Ubuntu versions

26.0424.0422.0420.04

The support matrix certifies Ubuntu 26.04, 24.04, 22.04, and 20.04.

high confidence · verified 2026-10-08 · certified operating system

K3s version

1.34.12+k3s1

Supported Ubuntu versions

26.0424.0422.0420.04

The support matrix certifies Ubuntu 26.04, 24.04, 22.04, and 20.04.

high confidence · verified 2026-10-08 · certified operating system

Primary evidence

Sources

Every constraint above is backed by upstream documentation, tagged source, release notes, or another project-owned primary source.

  1. K3s 1.37 Support MatrixAccessed 2026-10-08
  2. K3s 1.36 Support MatrixAccessed 2026-10-08
  3. K3s 1.35 Support MatrixAccessed 2026-10-08
  4. K3s 1.34 Support MatrixAccessed 2026-10-08