Why Copy Fail Couldn't Touch Workloads Under a Tailored AppArmor Profile
Copy Fail (CVE-2026-31431) is a Linux kernel LPE that's already in CISA KEV and reaches every container that inherits the AF_ALG kernel surface by default. For workloads running under a behavior-generated AppArmor profile, the exploit's required syscall path was never allowed in the first place. Here's why, and how to confirm your exposure in seconds.