CVE-2026-31431 — Copy Fail tracking site

Source for the Copy Fail patch-status tracker: a single-page site recording which distributions have shipped a fix for the algif_aead privilege escalation in the Linux kernel.

Where the facts live

Everything about the bug — CVE IDs, affected and fixed versions, upstream fix commits, discovery and disclosure credit, and final per-distribution patch status — belongs to the tracker page, not to this README:

Rendered: https://kimmo.cloud/CVE-2026-31431/
Source: site/content/_index.md

Edit that file; everything else in this repo is build infrastructure.

None of it is restated here on purpose. A second copy in this README would only rot as the tracker page is revised. Resist re-adding a summary.

Deployment plan and current setup state live in WEBSITE.md.

Local development

Requires Hugo extended (≥ 0.146.0) and Go (for Hugo Modules to fetch the PaperMod theme).

With Nix (recommended)

nix develop          # shell with hugo + go + git (pinned by flake.lock once generated)
cd site
hugo server          # local preview at http://localhost:1313/CVE-2026-31431/

If you use direnv, direnv allow once and the dev shell auto-activates whenever you cd into the repo.

Without Nix

Install Hugo extended ≥ 0.146.0 and Go ≥ 1.24 yourself, then:

cd site
hugo server          # http://localhost:1313/CVE-2026-31431/

Build and publish

make build       # local build into site/public/
make dist        # build, then rsync to haig:.www/sites/kimmo.cloud/htdocs/CVE-2026-31431/

make dist runs make build first.

Repo layout

.
├── flake.nix              # Nix dev environment (hugo + go + git)
├── .envrc                 # direnv hook → `use flake`
├── .gitignore
├── Makefile               # `make build`, `make dist`
├── LICENSE                # CC BY 4.0
├── README.md              # this file
├── CLAUDE.md              # project instructions for Claude Code
├── WEBSITE.md             # publication plan / decisions log
└── site/                  # Hugo project
    ├── hugo.toml
    ├── content/
    │   └── _index.md      # the tracker (single page)
    ├── assets/css/extended/widen.css  # PaperMod CSS overrides
    ├── layouts/shortcodes/toc.html    # custom TOC shortcode
    ├── go.mod, go.sum     # Hugo Modules — pulls PaperMod theme
    └── …                  # standard Hugo skeleton

License

CC BY 4.0 — share and adapt with attribution.

CVE-2026-31431

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