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01 Record

CVE-2020-25647

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

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector

02 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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.79% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 55.9% of scored records. A rank, not a probability.
NVD base score
7.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-03-03 16:40Z5 YR AGO
Last updated
2024-08-04 15:40Z2 YR AGO
Reserved
2020-09-16
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
Data version
5.1
Document digest
23e3624ebc68d380bafd25b1a6cf7a599103c218d3146eb7378de617f4ee55e3

05 Affected products

VendorProductVersionsPlatforms
n/agrub2grub 2.06—

06 References

07 Fixed in

AlmaLinux 8

  • shim-aa64
    Fixed in 15.4-2.el8_1.alma
  • shim-ia32
    Fixed in 15.4-2.el8_1.alma
  • shim-unsigned-aarch64
    Fixed in 15-7.el8_1.alma
  • shim-unsigned-x64
    Fixed in 15.4-4.el8_1.alma
  • shim-x64
    Fixed in 15.4-2.el8_1.alma

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Arch Linux

  • grub
    Fixed in 2:2.06-1

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 8

  • shim-aa64
    Fixed in 15.4-2.el8_1.alma
  • shim-ia32
    Fixed in 15.4-2.el8_1.alma
  • shim-unsigned-aarch64
    Fixed in 15-7.el8_1.alma
  • shim-unsigned-x64
    Fixed in 15.4-4.el8_1.alma
  • shim-x64
    Fixed in 15.4-2.el8_1.alma

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • grub2
    Fixed in 2.04-16

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • grub2
    Fixed in 2.04-16

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • grub2
    Fixed in 2.04-16

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.