ISN 2026-20: GRUB Shell Escape in IGEL OS

First published 17 June 2026

CVSS:3.1: 6.1 (Medium)

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

A security vulnerability has been found in the IGEL OS boot mechanism. This affects the following product versions:

It has been discovered that an attacker with physical access can manipulate the GRUB boot stage in IGEL OS to drop to a root shell.