CVE-2022-28735

The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems

Medium · published July 20, 2023

CVSS v3.1
6.7
EPSS
0%
Percentile
23.0
In the wild
Unconfirmed
What it is

The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems. Allowing such files to be loaded may lead to unverified code and modules to be loaded in GRUB2 breaking the secure boot trust-chain.

The record
Technical detail
CVSS v3.1
6.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00313 · 23.0th percentile
Published
2023-07-20T00:22Z
EPSS history
Timeline
  • 20 JUL 00:22Z
    The GRUB2's shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems
    cvelistv5