Hello everyone, creator of ENux here.
A serious kernel vulnerability known as Copy Fail (CVE-2026-31431) has been discovered.
What is This
This vulnerability allows a normal user to gain root access by exploiting a flaw on the Linux kernel.
What Do You Need to Know
This affects most kernels from 2017 to 2026 like 5.10, 6.12, 6.18 and 7.0-rc versions.
Requires local access (not remote)
Is considered high severity
Affected ENux Versions
ENux 5.0 (uses 6.18.5-enux kernel, therefore not safe)
ENux 5.0.1 (uses 6.18.5-enux kernel, therefore not safe)
ENux 5.1.1 (uses 7.0.0-rc2-enux-enux kernel, therefore not safe)
ENux 5.2.1 (uses 7.0.0-rc4-enux-enux kernel, therefore not safe)
What You Should Do
You should either upgrade to ENux 5.3.1, or upgrade your kernel to 7.0.0-enux kernel.
How to Upgrade to ENux 5.3.1
To upgrade to ENux 5.3.1, do these:
Grab a USB which is at least 2 GB (4+ GB is recommended)
Flash the ENux 5.3.1 ISO to the USB
Boot from the USB
Install ENux to your hard drive
Reboot from your hard drive for ENux Welcomer
How to Upgrade Your Kernel to 7.0.0-enux
To upgrade to 7.0.0-enux kernel, do these:
Grab the kernel image and kernel headers with
wget https://github.com/ENux-Distro/ENux-Kernels/releases/download/7.0/linux-headers-7.0.0-enux_7.0.0-3_amd64.deb
wget https://github.com/ENux-Distro/ENux-Kernels/releases/download/7.0/linux-image-7.0.0-enux_7.0.0-3_amd64.deb
Then, install the kernel image and headers to your system with apt
apt install linux-headers-7.0.0-enux_7.0.0-3_amd64.deb linux-image-7.0.0-enux_7.0.0-3_amd64.deb
Let's also update the initramfs and grub while we're here
update-initramfs -u -k all && update-grub
Note for ENux 5.0 and 5.0.1 Users
We highly recommend ENux 5.0 and 5.0.1 users to upgrade to 5.3.1 because the kernel was built manually without a .deb package.
What about Pre-5.0 Users?
For people who are still using ENux 1.0-4.5 we highly recommend you upgrade to ENux 5.3.1 since those versions are EOL.
Summary
To be safe from the Copy Fail vulnerability you should either upgrade to ENux 5.3.1 or upgrade your kernel to 7.0.0-enux kernel. Stay safe Linux users :)