A dashed circle marks the intended landing site of the copy; a solid disk cascades down and to the right out of it in three progressively displaced bands — the copy missing its target. CVE-2026-31431 100% reliable every distro since 2017 container escape primitive 732 bytes found by Xint Code Copy Fail Most Linux LPEs need a race window or a kernel-specific offset. Copy Fail is a straight-line log

