Description
UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Insyde Software | InsydeH2O | See in the Solution | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | edk2 +1 | No fix yet | — |
Advisories 1
- WID-SEC-2026-3240 Insyde UEFI Firmware und Cisco UCS (UEFI Shell Secure Boot): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Sep 9, 2026