🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026
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

An application aborts at startup; `dmesg` shows `audit: type=1400 apparmor=”DENIED”`.

Environment & Reproduction

Triggered after upgrading an app package whose binary path or capability set changed.

Root Cause Analysis

The shipped AppArmor profile no longer matches the new binary behaviour.

Quick Triage

List loaded profiles: `aa-status` and identify the denied program.

Step-by-Step Diagnosis

Replay denials with `journalctl -k | grep apparmor` and run `aa-logprof` interactively.

Illustrative mockup for sles-16 — apparmor_profile-blocks_terminal
Terminal diagnostics for AppArmor profile blocks legitimate application start — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Update the profile in `/etc/apparmor.d/`, then `systemctl reload apparmor`.

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Illustrative mockup for sles-16 — apparmor_profile-blocks_logs
Logs and evidence for AppArmor profile blocks legitimate application start — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Put the profile in complain mode (`aa-complain `) during validation.

Verification & Acceptance Criteria

Application starts cleanly and `aa-status` reports the profile in enforce mode.

Rollback Plan

Revert the profile file from snapper or `/etc/apparmor.d/*.rpmsave` if changes regress.

Prevention & Hardening

Test AppArmor profile changes in staging before promoting to production.

Linked to `audit2allow`-style workflows familiar from SELinux.

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 AppArmor administration guide.

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