How Cloudflare responded to the “Copy Fail” Linux vulnerability

<p>On April 29, 2026, a Linux kernel local privilege escalation vulnerability was publicly disclosed under the name "Copy Fail" (<a href="https://security-tracker.debian.org/tracker/CVE-2026-31431"><u>CVE-2026-31431</u></a>). Cloudflare’s Security and Engineering teams began assessing the vulnerability as soon as it was disclosed. We reviewed the exploit technique, evaluated exposure across our in