[Snyk] Security upgrade node from 22-slim to 22.22.1-trixie-slim

[Yeraze]

Snyk has created this PR to fix 4 vulnerabilities in the dockerfile dependencies of this project.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Snyk changed the following file(s):

• Dockerfile.armv7

We recommend upgrading to node:22.22.1-trixie-slim, as this image has only 27 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Integer Overflow or Wraparound SNYK-DEBIAN12-ZLIB-6008963	500
	Improper Access Control SNYK-DEBIAN12-SYSTEMD-15656988	371
	Improper Access Control SNYK-DEBIAN12-SYSTEMD-15656988	371
	Improper Input Validation SNYK-DEBIAN12-GNUTLS28-1547121	257
	CVE-2026-4438 SNYK-DEBIAN12-GLIBC-15754000	221

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Important

• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Integer Overflow or Wraparound
🦉 Improper Access Control
🦉 Improper Input Validation

[github-actions]

Claude finished @Yeraze's task —— View job

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PR Security Review ✅

Reviewing this Snyk security upgrade PR that updates the Node.js base image to fix vulnerabilities.

Task List:

• Read and analyze the Dockerfile changes
• Review project guidelines for Docker/security practices
• Evaluate security vulnerabilities being fixed
• Assess potential compatibility and performance impacts
• Provide comprehensive review feedback

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Review Summary

✅ APPROVED - This is a straightforward and beneficial security upgrade that should be merged.

Code Quality & Best Practices

Excellent - The changes are minimal and follow Docker best practices:

• Uses pinned version tags (22.22.1-trixie-slim) instead of floating tags - this is a security best practice
• Consistently updates both build and production stages
• Maintains the established ARMv7-specific architecture requirements
• Follows the project's pattern (main Dockerfile uses node:24.14.0-alpine3.22 with specific versioning)

Security Assessment

Strong Improvement - Fixes 4 significant vulnerabilities:

• CRITICAL: Integer Overflow in zlib (Score: 500) - High priority fix
• HIGH: Improper Access Control in systemd (Score: 371, 2 instances)
• MEDIUM: Input Validation in gnutls28 (Score: 257)
• MEDIUM: CVE-2026-4438 in glibc (Score: 221)

The new base image (node:22.22.1-trixie-slim) reduces vulnerabilities from unknown count to 27 known vulnerabilities, representing a significant security improvement.

Compatibility & Performance Analysis

Low Risk - This upgrade should have minimal impact:

✅ Compatibility:

• Stays within Node.js 22 LTS (22-slim → 22.22.1-trixie-slim)
• No breaking changes to Node.js runtime or APIs
• ARMv7 architecture support maintained (critical for Raspberry Pi 2/3)
• Debian base transitions from previous Debian to Trixie (Debian 13) - generally backward compatible

✅ Performance:

• Similar performance characteristics expected
• Trixie-slim maintains minimal footprint philosophy
• No additional dependencies or layer bloat introduced

⚠️ Potential Concerns:

• Debian version change (→ Trixie) could have different package versions, but this is typical for security updates
• The comment on line 2 documents why Node.js 22 is used (# Node.js 24 doesn't support ARMv7)

Testing Recommendations

Since this is a security-focused infrastructure change:

1. Build Test: Verify the Docker build completes successfully for ARMv7
2. Runtime Test: Confirm MeshMonitor starts and basic functionality works
3. Dependency Test: Ensure better-sqlite3 and other native modules still compile correctly

The project's CLAUDE.md indicates testing should be done via docker-compose.dev.yml and system tests at tests/system-tests.sh.

Missing Elements

None - This PR appropriately focuses solely on the security upgrade without unnecessary scope creep.

Recommendation

MERGE immediately after basic build/runtime verification. Security vulnerabilities (especially the Critical-rated zlib issue) should be patched promptly.

The changes are minimal, well-targeted, and follow established Docker best practices. The ARMv7-specific nature of this Dockerfile is properly maintained.

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[Yeraze]

Closing in favor of #2446