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grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap

🗓️ 16 Jun 2022 15:39:42Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 4 Views

Grub bootloader flaw: crafted grayscale PNG enables out-of-bounds heap write, code execution, and secure boot bypass.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2021-3695
6 Jul 202216:15
–attackerkb
Tenable Nessus		Amazon Linux 2022 : grub2-common, grub2-efi-aa64, grub2-efi-aa64-cdboot (ALAS2022-2022-109)
7 Sep 202200:00
–nessus
Tenable Nessus		Amazon Linux 2023 : grub2-common, grub2-efi-aa64, grub2-efi-aa64-cdboot (ALAS2023-2023-020)
21 Mar 202300:00
–nessus
Tenable Nessus		Amazon Linux 2 : grub2 (ALAS-2023-2146)
20 Jul 202300:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0134: grub2, mokutil, shim, and shim-unsigned-x64 (ALINUX3-SA-2022:0134)
14 May 202500:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0164: grub2, mokutil, shim, and shim-unsigned-x64 (ALINUX3-SA-2022:0164)
14 May 202500:00
–nessus
Tenable Nessus		AlmaLinux 9 : grub2, mokutil, shim, and shim-unsigned-x64 (ALSA-2022:5099)
16 Nov 202200:00
–nessus
Tenable Nessus		EulerOS 2.0 SP8 : grub2 (EulerOS-SA-2022-2221)
17 Aug 202200:00
–nessus
Tenable Nessus		EulerOS 2.0 SP10 : grub2 (EulerOS-SA-2022-2242)
17 Aug 202200:00
–nessus
Tenable Nessus		EulerOS 2.0 SP10 : grub2 (EulerOS-SA-2022-2255)
17 Aug 202200:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8anygrub2-common1:2.02-123.el8_6.8.noarchgrub2-common-1:2.02-123.el8_6.8.noarch.noarch.rpm
Red Hat Enterprise Linux8aarch64grub2-debuginfo1:2.02-123.el8_6.8grub2-debuginfo-1:2.02-123.el8_6.8.aarch64.rpm
Red Hat Enterprise Linux8ppc64legrub2-debuginfo1:2.02-123.el8_6.8grub2-debuginfo-1:2.02-123.el8_6.8.ppc64le.rpm
Red Hat Enterprise Linux8x86_64grub2-debuginfo1:2.02-123.el8_6.8grub2-debuginfo-1:2.02-123.el8_6.8.x86_64.rpm
Red Hat Enterprise Linux8aarch64grub2-debugsource1:2.02-123.el8_6.8grub2-debugsource-1:2.02-123.el8_6.8.aarch64.rpm
Red Hat Enterprise Linux8ppc64legrub2-debugsource1:2.02-123.el8_6.8grub2-debugsource-1:2.02-123.el8_6.8.ppc64le.rpm
Red Hat Enterprise Linux8x86_64grub2-debugsource1:2.02-123.el8_6.8grub2-debugsource-1:2.02-123.el8_6.8.x86_64.rpm
Red Hat Enterprise Linux8aarch64grub2-efi-aa641:2.02-123.el8_6.8grub2-efi-aa64-1:2.02-123.el8_6.8.aarch64.rpm
Red Hat Enterprise Linux8aarch64grub2-efi-aa64-cdboot1:2.02-123.el8_6.8grub2-efi-aa64-cdboot-1:2.02-123.el8_6.8.aarch64.rpm
Red Hat Enterprise Linux8anygrub2-efi-aa64-modules1:2.02-123.el8_6.8.noarchgrub2-efi-aa64-modules-1:2.02-123.el8_6.8.noarch.noarch.rpm
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26 Jun 2026 15:35Current
7.7High risk
Vulners AI Score7.7
CVSS 24.4
CVSS 3.14.5
EPSS0.00462
CWE-787
Grub bootloaderGrayscale imageHeap corruptionOut of boundsCode executionSecure boot bypass
4