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grub2: Stack buffer overflow in grub_parser_split_cmdline()

🗓️ 02 Mar 2021 21:13:27Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

grub version two stack overflow in grub_parser_split_cmdline may overflow a 1kB buffer with large variables, risking Secure Boot bypass.

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Packages
Refs
ReporterTitlePublishedViews
Family
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Amazon Linux 2 : grub2 (ALAS-2021-1684)
16 Jul 202100:00
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Alibaba Cloud Linux 3 : 0026: grub2 (ALINUX3-SA-2021:0026)
14 May 202500:00
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nessus
Alibaba Cloud Linux 3 : 0048: fwupd (ALINUX3-SA-2021:0048)
14 May 202500:00
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AlmaLinux 8 : grub2 (ALSA-2021:0696)
9 Feb 202200:00
nessus
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AlmaLinux 8 : shim (ALSA-2021:1734)
9 Feb 202200:00
nessus
nessus
AlmaLinux 8 : fwupd (ALSA-2021:2566)
9 Feb 202200:00
nessus
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CentOS 8 : grub2 (CESA-2021:0696)
3 Mar 202100:00
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nessus
CentOS 8 : fwupd (CESA-2021:2566)
3 Jul 202100:00
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CentOS 9 : shim-unsigned-x64-15.6-1.el9
29 Feb 202400:00
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CentOS 7 : grub2 (RHSA-2021:0699)
9 Oct 202400:00
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7.6ppc64grub21:2.02-0.86.el7_6.3grub2-1:2.02-0.86.el7_6.3.ppc64.rpm
Red Hat Enterprise Linux7.6ppc64legrub21:2.02-0.86.el7_6.3grub2-1:2.02-0.86.el7_6.3.ppc64le.rpm
Red Hat Enterprise Linux7.6x86_64grub21:2.02-0.86.el7_6.3grub2-1:2.02-0.86.el7_6.3.x86_64.rpm
Red Hat Enterprise Linux7.6noarchgrub2-common1:2.02-0.86.el7_6.3grub2-common-1:2.02-0.86.el7_6.3.noarch.rpm
Red Hat Enterprise Linux7.6ppc64grub2-debuginfo1:2.02-0.86.el7_6.3grub2-debuginfo-1:2.02-0.86.el7_6.3.ppc64.rpm
Red Hat Enterprise Linux7.6ppc64legrub2-debuginfo1:2.02-0.86.el7_6.3grub2-debuginfo-1:2.02-0.86.el7_6.3.ppc64le.rpm
Red Hat Enterprise Linux7.6x86_64grub2-debuginfo1:2.02-0.86.el7_6.3grub2-debuginfo-1:2.02-0.86.el7_6.3.x86_64.rpm
Red Hat Enterprise Linux7.6noarchgrub2-efi-aa64-modules1:2.02-0.86.el7_6.3grub2-efi-aa64-modules-1:2.02-0.86.el7_6.3.noarch.rpm
Red Hat Enterprise Linux7.6x86_64grub2-efi-ia321:2.02-0.86.el7_6.3grub2-efi-ia32-1:2.02-0.86.el7_6.3.x86_64.rpm
Red Hat Enterprise Linux7.6x86_64grub2-efi-ia32-cdboot1:2.02-0.86.el7_6.3grub2-efi-ia32-cdboot-1:2.02-0.86.el7_6.3.x86_64.rpm
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26 Jun 2026 22:26Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.16.7
CVSS 27.2
EPSS0.00573
4