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grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass

🗓️ 23 Apr 2024 16:44:09Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 3 Views

Grub2 flaw: pf2 font causes out-of-bounds write, risking memory corruption and secure boot bypass.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7ppc64grub21:2.02-0.87.el7_9.14grub2-1:2.02-0.87.el7_9.14.ppc64.rpm
Red Hat Enterprise Linux7ppc64legrub21:2.02-0.87.el7_9.14grub2-1:2.02-0.87.el7_9.14.ppc64le.rpm
Red Hat Enterprise Linux7x86_64grub21:2.02-0.87.el7_9.14grub2-1:2.02-0.87.el7_9.14.x86_64.rpm
Red Hat Enterprise Linux7anygrub2-common1:2.02-0.87.el7_9.14.noarchgrub2-common-1:2.02-0.87.el7_9.14.noarch.noarch.rpm
Red Hat Enterprise Linux7ppc64grub2-debuginfo1:2.02-0.87.el7_9.14grub2-debuginfo-1:2.02-0.87.el7_9.14.ppc64.rpm
Red Hat Enterprise Linux7ppc64legrub2-debuginfo1:2.02-0.87.el7_9.14grub2-debuginfo-1:2.02-0.87.el7_9.14.ppc64le.rpm
Red Hat Enterprise Linux7x86_64grub2-debuginfo1:2.02-0.87.el7_9.14grub2-debuginfo-1:2.02-0.87.el7_9.14.x86_64.rpm
Red Hat Enterprise Linux7anygrub2-efi-aa64-modules1:2.02-0.87.el7_9.14.noarchgrub2-efi-aa64-modules-1:2.02-0.87.el7_9.14.noarch.noarch.rpm
Red Hat Enterprise Linux7x86_64grub2-efi-ia321:2.02-0.87.el7_9.14grub2-efi-ia32-1:2.02-0.87.el7_9.14.x86_64.rpm
Red Hat Enterprise Linux7x86_64grub2-efi-ia32-cdboot1:2.02-0.87.el7_9.14grub2-efi-ia32-cdboot-1:2.02-0.87.el7_9.14.x86_64.rpm
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25 Jun 2026 11:05Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.18.6
EPSS0.00514
SSVC
CWE-787
grubpf two fontout-of-bounds writememory corruptionsecure boot bypass
3