Add 7.2.6 release notes

[ljm42]

Before Submitting This PR, Please Ensure You Have Completed The Following:

1. Are internal links to wiki documents using relative file links?
2. Are all new documentation files lowercase, with dash separated names (ex. unraid-os.mdx)?
3. Are all assets (images, etc), located in an assets/ subfolder next to the .md/mdx files?
4. Have you checked to ensure there aren't other open Pull Requests for the same update/change?
5. Is the build succeeding?

Summary by CodeRabbit

Release Notes

• Documentation
  • Published release notes for Unraid OS 7.2.6 with step-by-step upgrade instructions, known issues documentation, and rollback guidance.
  • Linux kernel updated to 6.12.87-Unraid to address critical security vulnerabilities.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR adds release notes for Unraid OS version 7.2.6 (2026-05-08). The document provides upgrade instructions, known issues reference, rolling back guidance, and details the Linux kernel upgrade addressing CVE-2026-43284 and CVE-2026-43500, with kernel version 6.12.87-Unraid specified.

Changes

Unraid 7.2.6 Release Notes

Layer / File(s)	Summary
Release Header docs/unraid-os/release-notes/7.2.6.md	Version 7.2.6 released 2026-05-08 with Linux kernel security update.
User Guidance docs/unraid-os/release-notes/7.2.6.md	Upgrading section links to step-by-step instructions. Known issues reference prior 7.2.5 notes. Rolling back section references 7.2.5 guidance.
Technical Changes docs/unraid-os/release-notes/7.2.6.md	Security subsection describes kernel upgrade for CVE-2026-43284 and CVE-2026-43500 (Dirty Frag). Kernel version documented as 6.12.87-Unraid.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A release note springs to life so bright,
With kernel patches to set things right,
CVEs vanquished, security squared,
Seven-point-two-point-six declared!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: adding release notes for Unraid OS version 7.2.6.
Description check	✅ Passed	The pull request description includes the complete pre-submission checklist template with all required sections and checkboxes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch add-7.2.6-release-notes

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[coderabbitai]

🧹 Nitpick comments (1)

docs/unraid-os/release-notes/7.2.6.md (1)

25-25: ⚡ Quick win

Polish kernel bullet wording for consistency.

Line 25 reads a bit fragmentary. Consider matching the style used in other bullets, e.g. “Linux kernel: 6.12.87-Unraid” or “Upgrade Linux kernel to 6.12.87-Unraid”.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@docs/unraid-os/release-notes/7.2.6.md` at line 25, The bullet "version
6.12.87-Unraid" is fragmentary; update it to match the style of other bullets by
making it explicit and consistent — e.g., change the text to "Linux kernel:
`6.12.87-Unraid`" or "Upgrade Linux kernel to `6.12.87-Unraid`" so the kernel
identifier (6.12.87-Unraid) is presented with a clear label.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@docs/unraid-os/release-notes/7.2.6.md`:
- Line 25: The bullet "version 6.12.87-Unraid" is fragmentary; update it to
match the style of other bullets by making it explicit and consistent — e.g.,
change the text to "Linux kernel: `6.12.87-Unraid`" or "Upgrade Linux kernel to
`6.12.87-Unraid`" so the kernel identifier (6.12.87-Unraid) is presented with a
clear label.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: a714bc88-bb51-4de6-81cd-72095f99604d

📥 Commits

Reviewing files that changed from the base of the PR and between b108fd4 and a22504b.

📒 Files selected for processing (1)

• docs/unraid-os/release-notes/7.2.6.md

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	unraid-docs	a22504b	Commit Preview URL Branch Preview URL	May 08 2026, 09:30 PM