🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: SUSE Linux Enterprise Server 15

📖 ~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 crashes or denies service because AppArmor blocks file or capability access.

Environment & Reproduction

Common on SLES 15 after upgrading a packaged service whose profile lags behind the binary.

Root Cause Analysis

Profile path patterns no longer match actual binary locations or new file dependencies.

Quick Triage

Check `aa-status` and `journalctl -k | grep DENIED` to find rejected operations.

Step-by-Step Diagnosis

Use `aa-logprof` to walk through learned events and propose policy updates.

Illustrative mockup for sles-15 — apparmor_profile-blocks-app_terminal
Terminal diagnostics for AppArmor profile blocks legitimate application action — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Adjust the profile, reload with `apparmor_parser -r /etc/apparmor.d/`, and validate.

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Illustrative mockup for sles-15 — apparmor_profile-blocks-app_logs
Logs and evidence for AppArmor profile blocks legitimate application action — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Place the profile in complain mode temporarily with `aa-complain` while investigating.

Verification & Acceptance Criteria

Application runs without further `apparmor=”DENIED”` kernel messages.

Rollback Plan

Restore the previous profile from `/etc/apparmor.d` backup if regression occurs.

Prevention & Hardening

Track profile updates with each package upgrade in change control.

Pairs with `apparmor=”DENIED” operation=”open”` audit lines.

Related tutorial: View the step-by-step tutorial for sles-15.

View all sles-15 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

SUSE AppArmor administration and aa-logprof usage docs.

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