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CVE-2020-27779

HIGH

7.5

CVSS Score

Published: March 3, 2021 at 04:40 PM UTC

Updated: June 17, 2026 at 03:09 AM UTC

8 products affected across 4 vendorsFedoraEnterprise LinuxEnterprise Linux Workstation

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Severity

HIGH7.5

Exploit prediction

EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora · Fedora Projectrpm

95%

95%

v < 2.06grub 2.06

Affected range stops below 2.06, so it looks safe — our inference, not a vendor statement

ONTAP Select Deploy administration utility · NetApp

95%

All versions

Enterprise Linux · Red Hatrpm

95%

Enterprise Linux Server Aus · Red Hatrubygems

95%

7.2 7.3 7.4 7.6 7.7 8.2

Enterprise Linux Server Eus · Red Hatrubygems

95%

Enterprise Linux Server Tus · Red Hatrubygems

95%

7.4 7.6 7.7 8.2

Enterprise Linux Workstation · Red Hatrubygems

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCIssue TrackingThird Party Advisory

Source: [email protected]

https://bugzilla.redhat.com/show_bug.cgi?id=1900698

Vendor Advisoryx_refsource_FEDORA

Source: [email protected]

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/

Vendor Advisoryx_refsource_GENTOOThird Party Advisory

Source: [email protected]

https://security.gentoo.org/glsa/202104-05

x_refsource_CONFIRMThird Party Advisory

Source: [email protected]

https://security.netapp.com/advisory/ntap-20220325-0001/

CVSS

7.5HIGH[email protected]

Attack Vector: LOCAL
Complexity: HIGH
Privileges: HIGH
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-285NVD-CWE-Other

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