Copy Fail can't affect files it can't access.

PoC attack on k8s [1] claims execution through sibling layers of kube-proxy, host filesystem access through /dev/ [2].

[1] https://github.com/Percivalll/Copy-Fail-CVE-2026-31431-Kuber...

[2] https://github.com/Percivalll/Copy-Fail-CVE-2026-31431-Kuber...