CVE-2026-82018
IGEL OS 12 / 11 Secure Boot Bypass via Unsigned igel.conf File
- State
- Published
- Severity
- 6.8 Medium
- Published
- Aug 28, 2026
- Updated
- Oct 1, 2026
- Reserved
- Aug 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-636 Not Failing Securely ('Failing Open')
Affected Products
| Product | Versions |
|---|---|
IGEL OS 12IGEL |
|
IGEL OS 11IGEL |
|
References
- Vendor Advisoryvendor-advisorypatch
- AmberWolf Blogtechnical-description
- DEF CON 34 Presentation
- https://www.vulncheck.com/advisories/igel-os-12-11-secure-boot-bypass-via-unsigned-igel-conf-filethird-party-advisory
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