CopyFail Mitigation write up by Dragos Ruiu of CanSecWest

For those who want to take additional investigations or steps into your respective systems regarding Copy Fail … this might be a good read from security research and founder of CanSecWest and PacSec, Dragos Ruiu.

For what it’s worth, today after updating to MiaB v75 and running sudo apt update && sudo apt upgrade, I ran the Ubuntu-suggested check and my system came back clean.

# grep -qE '^algif_aead ' /proc/modules && echo "Affected module is loaded" || echo "Affected module is NOT loaded"
Affected module is NOT loaded

care of: Fixes available for CVE-2026-31431 (Copy Fail) Linux Kernel Local Privilege Escalation Vulnerability | Ubuntu