6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
15.5%
GRUB2 does not call the module fini functions on exit, leading to Debian/Ubuntu’s peimage GRUB2 module leaving UEFI system table hooks after exit. This lead to a use-after-free condition, and could possibly lead to secure boot bypass.
[
{
"packageName": "grub2",
"product": "Debian based GNU GRUB",
"vendor": "Debian",
"repo": "https://git.savannah.gnu.org/cgit/grub.git",
"platforms": [
"Linux"
],
"versions": [
{
"lessThan": "2.12-1ubuntu5",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
]