LINUX SECURITY IS BROKEN — and CVE-2026-31431 proves it
00:00 Linux security myths: revisited
00:42 What is Copy Fail: CVE-2026-31431
01:10 How the page cache works
02:18 The vulnerable module, algif_aead
02:45 How the exploit works , 4 bytes at a time
04:14 Are you vulnerable? : check script
04:38 Fix it : update your kernel
04:57 Fix it : manual mitigation
05:41 Automate with the script
06:09 Why publish before all distros are patched?
07:48 AI is changing the disclosure model
09:36 The Unix privilege model is cracking
CVE-2026-31431 — Copy Fail. A 10 year old bug in the Linux kernel. Any unprivileged user becomes root in under a second. No password. Just Python.
In this video: how it works, how to check if you are vulnerable, and how to fix it.
Mitigation guide and script: https://youtux.org/copy_fail.html
https://copy.fail/