CVE-2026-82018
MEDIUM
6,8
Source: [email protected]
Attack Vector: physical
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM
6,1
Source: [email protected]
Attack Vector: physical
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Description
AI Translation Available
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.
636
Not Failing Securely ('Failing Open')
DraftCommon Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
Technologies:
Not Technology-Specific, ICS/OT
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%20CO…
https://www.vulncheck.com/advisories/igel-os-12-11-secure-boot-bypass-via-unsig…