Affected versions: SUSE Linux Enterprise Server 16

📖 ~1 min read

Table of contents
  1. Symptom & Impact
  2. Environment & Reproduction
  3. Root Cause Analysis
  4. Quick Triage
  5. Step-by-Step Diagnosis
  6. Solution – Primary Fix
  7. Solution – Alternative Approaches
  8. Verification & Acceptance Criteria
  9. Rollback Plan
  10. Prevention & Hardening
  11. Related Errors & Cross-Refs
  12. References & Further Reading

Symptom & Impact

`zypper patch` reports a kernel live patch installed, but `lscpu`-style verification still shows the unfixed CVE.

Environment & Reproduction

Occurs when the running kernel does not match the live patch package metadata.

Root Cause Analysis

Live patches target a specific kernel build; reboots into a different kernel orphan them.

Quick Triage

Compare `uname -r` to `rpm -qa kernel-livepatch-*`.

Step-by-Step Diagnosis

Inspect `/sys/kernel/livepatch/` to see which patches are enabled.

Illustrative mockup for sles-16 — kgraft_livepatch-load_terminal
Terminal diagnostics for SLE Live Patching kgraft module fails to load — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Reboot to the kernel matching the live patch, then run `zypper patch –category=security`.

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Illustrative mockup for sles-16 — kgraft_livepatch-load_logs
Logs and evidence for SLE Live Patching kgraft module fails to load — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Reinstall the matching `kernel-default` package to realign module versions.

Verification & Acceptance Criteria

`klp_state` for the patch shows `enabled` and CVE verification commands succeed.

Rollback Plan

Disable the live patch via `echo 0 > /sys/kernel/livepatch//enabled` if it misbehaves.

Prevention & Hardening

Keep livepatching policy aligned with kernel update cadence.

Related to `kdump` failing if kernel/initrd diverge.

Related tutorial: View the step-by-step tutorial for sles-16.

View all sles-16 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

SUSE Live Patching documentation.

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