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grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow

🗓️ 03 Aug 2020 12:06:43Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Grub2 overflow in grub_squash_read_symlink may lead to zero size allocation and heap overflow for squashfs symlinks.

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Tenable Nessus		CentOS 7 : grub2 (RHSA-2020:3217)
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Tenable Nessus		Debian DSA-4735-1 : grub2 - security update
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Tenable Nessus		EulerOS 2.0 SP8 : grub2 (EulerOS-SA-2020-1853)
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Tenable Nessus		EulerOS Virtualization for ARM 64 3.0.6.0 : grub2 (EulerOS-SA-2020-2000)
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7ppc64legrub21:2.02-0.86.el7grub2-1:2.02-0.86.el7.ppc64le.rpm
Red Hat Enterprise Linux7x86_64grub21:2.02-0.86.el7grub2-1:2.02-0.86.el7.x86_64.rpm
Red Hat Enterprise Linux7noarchgrub2-common1:2.02-0.86.el7grub2-common-1:2.02-0.86.el7.noarch.rpm
Red Hat Enterprise Linux7ppc64legrub2-debuginfo1:2.02-0.86.el7grub2-debuginfo-1:2.02-0.86.el7.ppc64le.rpm
Red Hat Enterprise Linux7x86_64grub2-debuginfo1:2.02-0.86.el7grub2-debuginfo-1:2.02-0.86.el7.x86_64.rpm
Red Hat Enterprise Linux7noarchgrub2-efi-aa64-modules1:2.02-0.86.el7grub2-efi-aa64-modules-1:2.02-0.86.el7.noarch.rpm
Red Hat Enterprise Linux7x86_64grub2-efi-ia321:2.02-0.86.el7grub2-efi-ia32-1:2.02-0.86.el7.x86_64.rpm
Red Hat Enterprise Linux7x86_64grub2-efi-ia32-cdboot1:2.02-0.86.el7grub2-efi-ia32-cdboot-1:2.02-0.86.el7.x86_64.rpm
Red Hat Enterprise Linux7noarchgrub2-efi-ia32-modules1:2.02-0.86.el7grub2-efi-ia32-modules-1:2.02-0.86.el7.noarch.rpm
Red Hat Enterprise Linux7x86_64grub2-efi-x641:2.02-0.86.el7grub2-efi-x64-1:2.02-0.86.el7.x86_64.rpm
Rows per page

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28 Jun 2026 09:06Current
7.3High risk
Vulners AI Score7.3
CVSS 24.6
CVSS 3.16.7
EPSS0.00482
CWE-190
grub twointeger overflowheap overflowsquashfs filesystemsymbolic linkdata confidentialitysystem availability
4