CVE-2026-46215 Exploit for Linux 7.0

c0d3 by : Antonius (w1sdom / ev1lut10n / sw0rdm4n) - bluedragonsec.com

https://github.com/bluedragonsecurity

This exploit works in a limited environment, check some requirements below !!!

WHAT THE HELL IS THIS ?

This is and exploit for CVE-2026-46215 (Linux Kernel Use After Free) Adapted for Linux 7.0 !!! WARNING !!! this exploit is not stable ! sometimes, this exploit might cause kernel panic ! you have been warned !!! ;-p

Please be patient ... the exploitation process might be long.

The bug ? old handle is not nulled -> dangling pointer (race to UAF)

Sorry ! this exploit is not reliable and not stable !!!

I don't have time to fix this.

Please be patient when running this exploit ! this will take a long time !

improved version from kratnowl cross-cache

gcc -o exploit exploit.c -lpthread -static

This exploit is adapted from https://github.com/0xCyberstan/CVE-2026-46215-POC/blob/main/poc.c

This exploit was designed for linux 7.0 but The vulnerability is from 7.0 to 7.0.8, including 7.0-rc* series Tested on lubuntu 26 with linux 7.0 only !!!

LPE

REQUIREMENTS

HOW TO TEST IN QEMU ?

Use lubuntu 26 or ubuntu 26 or ubuntu 26 server with linux 7.0. linux 7.0.1 - 7.0.8 is vulnerable, but I didn't design this exploit for other version that 7.0 but you can try, maybe this exploit will works (I didn't try any other version that linux 7.0) n.b : this exploit is designed for linux 7.0.

Use this command (just an example): qemu-system-x86_64
-machine type=q35,accel=kvm
-enable-kvm -cpu host -smp $(nproc) -m 6G
-drive file=lubuntu26.qcow2,format=qcow2,if=virtio,cache=none,aio=io_uring,discard=unmap
-netdev user,id=n0,hostfwd=tcp::2222-:22
-device virtio-net-pci,netdev=n0
-device virtio-rng-pci -device virtio-balloon
-vga virtio -display spice-app
-device virtio-serial-pci
-chardev spicevmc,id=spicechannel0,name=vdagent
-device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0
-device qemu-xhci,id=xhci
-device usb-tablet,bus=xhci.0 -device usb-kbd,bus=xhci.0
-rtc base=utc,clock=host
-serial mon:stdio
-s

WORKS IN TEXT MODE ONLY

To make this exploit works, the OS needs to be in text mode.

For lubuntu 26 or ubuntu 26, do this before testing the exploit :

sudo systemctl set-default multi-user.target && reboot

THIS EXPLOIT WILL WORKS FOR USERS IN VIDEO GROUP

To avoid this error : [-] No DRM, for lubuntu the user must be in video group, do this before run the exploit:

sudo usermod -a -G video your_username && newgrp video

e.g my user : robohax, so :

sudo usermod -a -G video robohax && newgrp video

Testing :

robohax@robohax-standardpc:~$ id

uid=1000(robohax) gid=1000(robohax) groups=1000(robohax),4(adm),24(cdrom),27(sudo),30(dip),44(video),46(plugdev),110(lpadmin),978(sambashare)

44(video) ===> this is needed to open /dev/dri !!!

PROCESS

I have added progress bar that indicates that the exploit is working (not stuck). As long as the progress bar is moving...it means you don't need to restart the OS.