Vulnerability Description
IGEL OS 12 before 12.9.0, 12.8.3 LTS and IGEL OS 11 before 11.11.150 contain a secure boot bypass vulnerability in the GRUB boot stage that allows physically present attackers to gain unauthorized root access by placing an unsigned empty file named igel.conf on a partition. Attackers can exploit GRUB's fail-open signature verification behavior to drop into an interactive GRUB prompt, then boot the device's own kernel with additional command-line arguments to obtain a root shell with the disk unlocked while leaving TPM PCR values unaltered.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://blog.amberwolf.com/blog/2026/august/thin-client-thin-crypto-overview/
- https://kb.igel.com/en/security-safety/current/isn-2026-20-grub-shell-escape-in-
- https://media.defcon.org/DEF%20CON%2034/DEF%20CON%2034%20presentations/DEF%20CON
- https://www.vulncheck.com/advisories/igel-os-12-11-secure-boot-bypass-via-unsign
FAQ
What is CVE-2026-82018?
CVE-2026-82018 is a vulnerability with a CVSS score of 6.1 (MEDIUM). IGEL OS 12 before 12.9.0, 12.8.3 LTS and IGEL OS 11 before 11.11.150 contain a secure boot bypass vulnerability in the GRUB boot stage that allows physically present attackers to gain unauthorized roo...
How severe is CVE-2026-82018?
CVE-2026-82018 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-82018?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.