CVE-2020-25647

Name: CVE-2020-25647
Creator: NVD / NIST
Published: 2021-03-03T17:15:11.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.6/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2020-25647 is a high-severity vulnerability rated 7.6/10 on the CVSS scale. A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Metrics

CVSS 3.1

7.6/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.79%

51.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gnu	Grub2	< 2.06
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux Server Aus	7.2
Redhat	Enterprise Linux Server Aus	7.3
Redhat	Enterprise Linux Server Aus	7.4
Redhat	Enterprise Linux Server Aus	7.6
Redhat	Enterprise Linux Server Aus	7.7
Redhat	Enterprise Linux Server Aus	8.2
Redhat	Enterprise Linux Server Eus	7.6
Redhat	Enterprise Linux Server Eus	7.7
Redhat	Enterprise Linux Server Eus	8.1
Redhat	Enterprise Linux Server Tus	7.4
Redhat	Enterprise Linux Server Tus	7.6
Redhat	Enterprise Linux Server Tus	7.7
Redhat	Enterprise Linux Server Tus	8.2
Redhat	Enterprise Linux Workstation	7.0
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Netapp	Ontap Select Deploy Administration Utility	All versions

References

https://bugzilla.redhat.com/show_bug.cgi?id=1886936Issue Tracking, Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
https://security.gentoo.org/glsa/202104-05Third Party Advisory
https://security.netapp.com/advisory/ntap-20220325-0001/Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1886936Issue Tracking, Patch, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
https://security.gentoo.org/glsa/202104-05Third Party Advisory
https://security.netapp.com/advisory/ntap-20220325-0001/Third Party Advisory

Timeline

Published: Mar 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25647?

How severe is CVE-2020-25647?

CVE-2020-25647 has a CVSS score of 7.6/10 (HIGH severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25647?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25647?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST