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grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled

🗓️ 02 Mar 2021 20:14:17Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 2 Views

GRUB2 flaw lets privileged users load crafted ACPI tables with Secure Boot, breaking kernel lockdown.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.4ppc64legrub21:2.02-0.86.el7_4.2grub2-1:2.02-0.86.el7_4.2.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64grub21:2.02-0.86.el7_4.2grub2-1:2.02-0.86.el7_4.2.x86_64.rpm
Red Hat Enterprise Linux7.4noarchgrub2-common1:2.02-0.86.el7_4.2grub2-common-1:2.02-0.86.el7_4.2.noarch.rpm
Red Hat Enterprise Linux7.4ppc64legrub2-debuginfo1:2.02-0.86.el7_4.2grub2-debuginfo-1:2.02-0.86.el7_4.2.ppc64le.rpm
Red Hat Enterprise Linux7.4x86_64grub2-debuginfo1:2.02-0.86.el7_4.2grub2-debuginfo-1:2.02-0.86.el7_4.2.x86_64.rpm
Red Hat Enterprise Linux7.4noarchgrub2-efi-aa64-modules1:2.02-0.86.el7_4.2grub2-efi-aa64-modules-1:2.02-0.86.el7_4.2.noarch.rpm
Red Hat Enterprise Linux7.4x86_64grub2-efi-ia321:2.02-0.86.el7_4.2grub2-efi-ia32-1:2.02-0.86.el7_4.2.x86_64.rpm
Red Hat Enterprise Linux7.4x86_64grub2-efi-ia32-cdboot1:2.02-0.86.el7_4.2grub2-efi-ia32-cdboot-1:2.02-0.86.el7_4.2.x86_64.rpm
Red Hat Enterprise Linux7.4noarchgrub2-efi-ia32-modules1:2.02-0.86.el7_4.2grub2-efi-ia32-modules-1:2.02-0.86.el7_4.2.noarch.rpm
Red Hat Enterprise Linux7.4x86_64grub2-efi-x641:2.02-0.86.el7_4.2grub2-efi-x64-1:2.02-0.86.el7_4.2.x86_64.rpm
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26 Jun 2026 22:26Current
5.8Medium risk
Vulners AI Score5.8
CVSS 26.2
CVSS 3.17.5
EPSS0.01738
2