CVE-2026-82018 json
IGEL OS 12 / 11 Secure Boot Bypass via Unsigned igel.conf File
published 2026-08-28 2 mo ago modified 2026-10-01 38 d ago also EUVD-2026-67962
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- IGEL IGEL OS 12 12.8.3, 12.9.0
- IGEL IGEL OS 11 11.11.150
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.8 | 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 |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| CNA | 4.0 | 6.8 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- IGEL IGEL OS 12
- IGEL IGEL OS 11
Classification
- Weakness
-
- CWE-636 Not Failing Securely
References
-
kb.igel.com
/en/security-safety/current/isn-2026-20-grub-shell-escape-in-igel-os
vendor-advisory, patch
-
blog.amberwolf.com
/blog/2026/august/thin-client-thin-crypto-overview/
technical-description
- media.defcon.org /DEF%20CON%2034/DEF%20CON%2034%20presentations/DEF%20CON%2034%20presentations/DEF%20CON%2034%20-%20Darren%20Mc
-
vulncheck.com
/advisories/igel-os-12-11-secure-boot-bypass-via-unsigned-igel-conf-file
third-party-advisory
Sources
- CVE List CVE-2026-82018
- NVD CVE-2026-82018
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.