vulnerability
Red Hat: CVE-2020-27779: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:M/Au:N/C:C/I:C/A:C) | Mar 2, 2021 | Mar 3, 2021 | Mar 27, 2026 |
Severity
7
CVSS
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
Published
Mar 2, 2021
Added
Mar 3, 2021
Modified
Mar 27, 2026
Description
A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Solutions
redhat-upgrade-fwupdredhat-upgrade-fwupd-debuginforedhat-upgrade-fwupd-debugsourceredhat-upgrade-fwupd-tests-debuginforedhat-upgrade-grub2redhat-upgrade-grub2-commonredhat-upgrade-grub2-debuginforedhat-upgrade-grub2-debugsourceredhat-upgrade-grub2-efi-aa64-modulesredhat-upgrade-grub2-efi-ia32redhat-upgrade-grub2-efi-ia32-cdbootredhat-upgrade-grub2-efi-ia32-modulesredhat-upgrade-grub2-efi-x64redhat-upgrade-grub2-efi-x64-cdbootredhat-upgrade-grub2-efi-x64-modulesredhat-upgrade-grub2-pcredhat-upgrade-grub2-pc-modulesredhat-upgrade-grub2-ppc-modulesredhat-upgrade-grub2-ppc64-modulesredhat-upgrade-grub2-ppc64le-modulesredhat-upgrade-grub2-toolsredhat-upgrade-grub2-tools-debuginforedhat-upgrade-grub2-tools-efiredhat-upgrade-grub2-tools-efi-debuginforedhat-upgrade-grub2-tools-extraredhat-upgrade-grub2-tools-extra-debuginforedhat-upgrade-grub2-tools-minimalredhat-upgrade-grub2-tools-minimal-debuginforedhat-upgrade-shim-ia32redhat-upgrade-shim-unsigned-x64redhat-upgrade-shim-x64
References
Rapid7 Labs
2026 Global Threat Landscape Report
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