Werk #22774: Memory (Linux): missing memory values

Component

Checks & agents

Title

Memory (Linux): missing memory values

Date

Oct 16, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

3.0.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0p18 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p40 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

If the Memory service of a Linux host received a memory section without the Linux specific values, for example only total and free memory and swap, the service crashed with KeyError: 'Cached'.

The service now goes to UNKNOWN and names the missing values, for example Memory information is missing: Buffers, Cached, Dirty.

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