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high 8.2

CVE-2020-25632 json

A flaw was found in grub2 in versions prior to 2.06.

published 5y ago modified 4mo ago also EUVD-2020-18303

cvss
8.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows the unloading of a module used as a dependency without checking if any other dependent module is still loaded leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Patch / fix

  • gnu grub2 2.06
  • grub2 Debian 14, Debian 13, Debian 12 2.04-16

debian advisories DEBIAN-CVE-2020-25632

  • grub2-signed Ubuntu 18.04 LTS 1.167~18.04.5
  • grub2-signed Ubuntu 20.04 LTS 1.167.2
  • grub2-unsigned Ubuntu 18.04 LTS 2.04-1ubuntu44.1.2
  • grub2-unsigned Ubuntu 20.04 LTS 2.04-1ubuntu44.2

ubuntu advisories UBUNTU-CVE-2020-25632

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • shim RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 15.4-2.el8_1
  • shim-x64 RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 15.4-2.el8_1
  • shim-aa64 RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 15.4-2.el8_1
  • shim-ia32 RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 15.4-2.el8_1
  • shim-unsigned-x64 RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 15.4-4.el8_1
  • shim-unsigned-aarch64 RHEL 8, RHEL 8.2 EUS, RHEL 8.1 EUS 15-7.el8_1
  • grub2 RHEL 7 1:2.02-0.87.el7_9.2
  • grub2-pc RHEL 7 1:2.02-0.87.el7_9.2

red hat advisories RHSA-2021:1734RHSA-2021:0701RHSA-2021:0699RHSA-2021:0700RHSA-2021:0704RHSA-2021:0703

  • grub2 SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +1 more 2.02-19.66.1
  • grub2 SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +6 more 2.02-26.43.1
  • grub2 SLE Module for Server Applications 15 SP2, SLE Module for Basesystem 15 SP2 2.04-9.34.1
  • grub2 SLES for SAP 12 SP3, SLES 12 SP3-LTSS, SLES 12 SP3-BCL +3 more 2.02-4.69.1
  • grub2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +3 more 2.02-12.47.1
  • grub2 SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +1 more 2.02-115.59.1
  • grub2 SLES 11 SP4-LTSS 2.02-0.66.26.1

suse advisories SUSE-SU-2021:0685-1SUSE-SU-2021:0684-1SUSE-SU-2021:0683-1SUSE-SU-2021:0682-1SUSE-SU-2021:0681-1SUSE-SU-2021:14659-1

  • grub2 openSUSE Tumbleweed 2.06-7.1
  • grub2 openSUSE Leap 15.2 2.04-lp152.7.22.7

opensuse advisories openSUSE-SU-2024:10824-1openSUSE-SU-2021:0462-1

  • shim-x64 AlmaLinux 8 15.4-2.el8_1.alma
  • shim-aa64 AlmaLinux 8 15.4-2.el8_1.alma
  • shim-ia32 AlmaLinux 8 15.4-2.el8_1.alma
  • shim-unsigned-x64 AlmaLinux 8 15.4-4.el8_1.alma
  • shim-unsigned-aarch64 AlmaLinux 8 15-7.el8_1.alma

almalinux advisories ALSA-2021:1734

  • fwupd Rocky Linux 8 1.5.9-1.el8_4
  • shim-unsigned-aarch64 Rocky Linux 8 15-7.el8.1.1

rocky linux advisories RLSA-2021:2566RLSA-2021:1734

  • grub Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 2.06-r0

alpine advisories ALPINE-CVE-2020-25632

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • grub2 CBL-Mariner 2.0 2.06~rc1-7

azure linux advisories AZL-6461

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • grub Arch Linux 2:2.06-1

arch linux advisories AVG-1629

Is CVE-2020-25632 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-25632 updated cvss 7.5

grub2: Use-after-free in rmmod command

  • Red Hat Enterprise Linux 7 fwupd, fwupdate, fwupdate-efi, fwupdate-libs
    affected: no fix available
  • Red Hat Enterprise Linux 8 fwupdate, fwupdate-efi, fwupdate-libs
    affected: no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder (v. 8) shim-unsigned-x64 15.4-4.el8_1, shim-unsigned-aarch64 15-7.el8_1
    fixed: vendor fix RHSA-2021:1734
  • Red Hat CodeReady Linux Builder EUS (v. 8.1) shim-unsigned-x64 15.4-4.el8_1, shim-unsigned-aarch64 15-7.el8_1
    fixed: vendor fix RHSA-2021:3675
  • Red Hat CodeReady Linux Builder EUS (v. 8.2) shim-unsigned-x64 15.4-4.el8_1, shim-unsigned-aarch64 15-7.el8_1
    fixed: vendor fix RHSA-2021:2790
  • Red Hat Enterprise Linux BaseOS (v. 8) shim 15.4-2.el8_1, fwupd 1.5.9-1.el8_4, grub2 2.02-90.el8_3.1, shim-x64 15.4-2.el8_1, shim-aa64 15.4-2.el8_1, shim-ia32 15.4-2.el8_1, +18 more
    fixed: vendor fix RHSA-2021:0696
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) shim 15.4-2.el8_1, fwupd 1.1.4-4.el8_1, grub2 2.02-87.el8_1.2, shim-x64 15.4-2.el8_1, shim-aa64 15.4-2.el8_1, shim-ia32 15.4-2.el8_1, +18 more
    fixed: vendor fix RHSA-2021:3675
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) shim 15.4-2.el8_1, fwupd 1.1.4-9.el8_2, grub2 2.02-87.el8_2.3, shim-x64 15.4-2.el8_1, shim-aa64 15.4-2.el8_1, shim-ia32 15.4-2.el8_1, +18 more
    fixed: vendor fix RHSA-2021:2790
show 22 more
  • Red Hat Enterprise Linux Client (v. 7) grub2 2.02-0.87.el7_9.2, grub2-pc 2.02-0.87.el7_9.2, grub2-tools 2.02-0.87.el7_9.2, grub2-common 2.02-0.87.el7_9.2, grub2-efi-x64 2.02-0.87.el7_9.2, grub2-efi-ia32 2.02-0.87.el7_9.2, +5 more Red Hat Enterprise Linux Client Optional (v. 7) grub2-ppc-modules 2.02-0.87.el7_9.2, grub2-ppc64-modules 2.02-0.87.el7_9.2, grub2-efi-x64-cdboot 2.02-0.87.el7_9.2, grub2-efi-ia32-cdboot 2.02-0.87.el7_9.2, grub2-ppc64le-modules 2.02-0.87.el7_9.2, grub2-efi-aa64-modules 2.02-0.87.el7_9.2
    fixed: vendor fix RHSA-2021:0699
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) grub2 2.02-0.86.el7_6.3, grub2-pc 2.02-0.86.el7_6.3, grub2-tools 2.02-0.86.el7_6.3, grub2-common 2.02-0.86.el7_6.3, grub2-efi-x64 2.02-0.86.el7_6.3, grub2-efi-ia32 2.02-0.86.el7_6.3, +5 more
    fixed: vendor fix RHSA-2021:0701
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) grub2 2.02-0.86.el7_7.3, grub2-pc 2.02-0.86.el7_7.3, grub2-tools 2.02-0.86.el7_7.3, grub2-common 2.02-0.86.el7_7.3, grub2-efi-x64 2.02-0.86.el7_7.3, grub2-efi-ia32 2.02-0.86.el7_7.3, +5 more
    fixed: vendor fix RHSA-2021:0700
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) grub2-ppc-modules 2.02-0.87.el7_9.2, grub2-ppc64-modules 2.02-0.87.el7_9.2, grub2-efi-x64-cdboot 2.02-0.87.el7_9.2, grub2-efi-ia32-cdboot 2.02-0.87.el7_9.2, grub2-ppc64le-modules 2.02-0.87.el7_9.2, grub2-efi-aa64-modules 2.02-0.87.el7_9.2
    fixed: vendor fix RHSA-2021:0699
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) grub2-ppc-modules 2.02-0.86.el7_6.3, grub2-ppc64-modules 2.02-0.86.el7_6.3, grub2-efi-x64-cdboot 2.02-0.86.el7_6.3, grub2-efi-ia32-cdboot 2.02-0.86.el7_6.3, grub2-ppc64le-modules 2.02-0.86.el7_6.3, grub2-efi-aa64-modules 2.02-0.86.el7_6.3
    fixed: vendor fix RHSA-2021:0701
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) grub2-ppc-modules 2.02-0.86.el7_7.3, grub2-ppc64-modules 2.02-0.86.el7_7.3, grub2-efi-x64-cdboot 2.02-0.86.el7_7.3, grub2-efi-ia32-cdboot 2.02-0.86.el7_7.3, grub2-ppc64le-modules 2.02-0.86.el7_7.3, grub2-efi-aa64-modules 2.02-0.86.el7_7.3
    fixed: vendor fix RHSA-2021:0700
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) grub2 2.02-0.86.el7_6.3, grub2-tools 2.02-0.86.el7_6.3, grub2-common 2.02-0.86.el7_6.3, grub2-ppc64le 2.02-0.86.el7_6.3, grub2-tools-extra 2.02-0.86.el7_6.3, grub2-tools-minimal 2.02-0.86.el7_6.3, +1 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) grub2-pc-modules 2.02-0.86.el7_6.3, grub2-ppc-modules 2.02-0.86.el7_6.3, grub2-ppc64-modules 2.02-0.86.el7_6.3, grub2-efi-x64-modules 2.02-0.86.el7_6.3, grub2-efi-aa64-modules 2.02-0.86.el7_6.3, grub2-efi-ia32-modules 2.02-0.86.el7_6.3
    fixed: vendor fix RHSA-2021:0701
  • Red Hat Enterprise Linux Server (v. 7) grub2 2.02-0.87.el7_9.2, grub2-pc 2.02-0.87.el7_9.2, grub2-ppc64 2.02-0.87.el7_9.2, grub2-tools 2.02-0.87.el7_9.2, grub2-common 2.02-0.87.el7_9.2, grub2-efi-x64 2.02-0.87.el7_9.2, +9 more
    fixed: vendor fix RHSA-2021:0699
  • Red Hat Enterprise Linux Server AUS (v. 7.2) grub2 2.02-0.86.el7_2.2, grub2-pc 2.02-0.86.el7_2.2, grub2-tools 2.02-0.86.el7_2.2, grub2-common 2.02-0.86.el7_2.2, grub2-efi-x64 2.02-0.86.el7_2.2, grub2-efi-ia32 2.02-0.86.el7_2.2, +7 more
    fixed: vendor fix RHSA-2021:0704
  • Red Hat Enterprise Linux Server AUS (v. 7.3) grub2 2.02-0.86.el7_3.2, grub2-pc 2.02-0.86.el7_3.2, grub2-tools 2.02-0.86.el7_3.2, grub2-common 2.02-0.86.el7_3.2, grub2-efi-x64 2.02-0.86.el7_3.2, grub2-efi-ia32 2.02-0.86.el7_3.2, +8 more
    fixed: vendor fix RHSA-2021:0703
  • Red Hat Enterprise Linux Server AUS (v. 7.4) grub2 2.02-0.86.el7_4.2, grub2-pc 2.02-0.86.el7_4.2, grub2-tools 2.02-0.86.el7_4.2, grub2-common 2.02-0.86.el7_4.2, grub2-efi-x64 2.02-0.86.el7_4.2, grub2-efi-ia32 2.02-0.86.el7_4.2, +5 more Red Hat Enterprise Linux Server E4S (v. 7.4) grub2 2.02-0.86.el7_4.2, grub2-pc 2.02-0.86.el7_4.2, grub2-tools 2.02-0.86.el7_4.2, grub2-common 2.02-0.86.el7_4.2, grub2-efi-x64 2.02-0.86.el7_4.2, grub2-ppc64le 2.02-0.86.el7_4.2, +7 more
    fixed: vendor fix RHSA-2021:0702
  • Red Hat Enterprise Linux Server EUS (v. 7.6) grub2 2.02-0.86.el7_6.3, grub2-pc 2.02-0.86.el7_6.3, grub2-ppc64 2.02-0.86.el7_6.3, grub2-tools 2.02-0.86.el7_6.3, grub2-common 2.02-0.86.el7_6.3, grub2-efi-x64 2.02-0.86.el7_6.3, +9 more
    fixed: vendor fix RHSA-2021:0701
  • Red Hat Enterprise Linux Server EUS (v. 7.7) grub2 2.02-0.86.el7_7.3, grub2-pc 2.02-0.86.el7_7.3, grub2-ppc64 2.02-0.86.el7_7.3, grub2-tools 2.02-0.86.el7_7.3, grub2-common 2.02-0.86.el7_7.3, grub2-efi-x64 2.02-0.86.el7_7.3, +9 more
    fixed: vendor fix RHSA-2021:0700
  • Red Hat Enterprise Linux Server Optional (v. 7) grub2-pc-modules 2.02-0.87.el7_9.2, grub2-ppc-modules 2.02-0.87.el7_9.2, grub2-ppc64-modules 2.02-0.87.el7_9.2, grub2-efi-x64-cdboot 2.02-0.87.el7_9.2, grub2-efi-ia32-cdboot 2.02-0.87.el7_9.2, grub2-efi-x64-modules 2.02-0.87.el7_9.2, +3 more
    fixed: vendor fix RHSA-2021:0699
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) grub2 2.02-0.86.el7_2.2, grub2-pc-modules 2.02-0.86.el7_2.2, grub2-ppc-modules 2.02-0.86.el7_2.2, grub2-ppc64-modules 2.02-0.86.el7_2.2, grub2-efi-x64-cdboot 2.02-0.86.el7_2.2, grub2-efi-ia32-cdboot 2.02-0.86.el7_2.2, +4 more
    fixed: vendor fix RHSA-2021:0704
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) grub2 2.02-0.86.el7_3.2, grub2-pc 2.02-0.86.el7_3.2, grub2-tools 2.02-0.86.el7_3.2, grub2-common 2.02-0.86.el7_3.2, grub2-efi-x64 2.02-0.86.el7_3.2, grub2-efi-ia32 2.02-0.86.el7_3.2, +11 more
    fixed: vendor fix RHSA-2021:0703
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) grub2-ppc-modules 2.02-0.86.el7_4.2, grub2-ppc64-modules 2.02-0.86.el7_4.2, grub2-efi-x64-cdboot 2.02-0.86.el7_4.2, grub2-efi-ia32-cdboot 2.02-0.86.el7_4.2, grub2-ppc64le-modules 2.02-0.86.el7_4.2, grub2-efi-aa64-modules 2.02-0.86.el7_4.2 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) grub2-pc-modules 2.02-0.86.el7_4.2, grub2-ppc-modules 2.02-0.86.el7_4.2, grub2-ppc64-modules 2.02-0.86.el7_4.2, grub2-efi-x64-cdboot 2.02-0.86.el7_4.2, grub2-efi-ia32-cdboot 2.02-0.86.el7_4.2, grub2-efi-x64-modules 2.02-0.86.el7_4.2, +3 more
    fixed: vendor fix RHSA-2021:0702
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) grub2-pc-modules 2.02-0.86.el7_6.3, grub2-ppc-modules 2.02-0.86.el7_6.3, grub2-ppc64-modules 2.02-0.86.el7_6.3, grub2-efi-x64-cdboot 2.02-0.86.el7_6.3, grub2-efi-ia32-cdboot 2.02-0.86.el7_6.3, grub2-efi-x64-modules 2.02-0.86.el7_6.3, +3 more
    fixed: vendor fix RHSA-2021:0701
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) grub2-pc-modules 2.02-0.86.el7_7.3, grub2-ppc-modules 2.02-0.86.el7_7.3, grub2-ppc64-modules 2.02-0.86.el7_7.3, grub2-efi-x64-cdboot 2.02-0.86.el7_7.3, grub2-efi-ia32-cdboot 2.02-0.86.el7_7.3, grub2-efi-x64-modules 2.02-0.86.el7_7.3, +3 more
    fixed: vendor fix RHSA-2021:0700
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) grub2-ppc-modules 2.02-0.86.el7_4.2, grub2-ppc64-modules 2.02-0.86.el7_4.2, grub2-efi-x64-cdboot 2.02-0.86.el7_4.2, grub2-efi-ia32-cdboot 2.02-0.86.el7_4.2, grub2-ppc64le-modules 2.02-0.86.el7_4.2, grub2-efi-aa64-modules 2.02-0.86.el7_4.2 Red Hat Enterprise Linux Server TUS (v. 7.4) grub2 2.02-0.86.el7_4.2, grub2-pc 2.02-0.86.el7_4.2, grub2-tools 2.02-0.86.el7_4.2, grub2-common 2.02-0.86.el7_4.2, grub2-efi-x64 2.02-0.86.el7_4.2, grub2-efi-ia32 2.02-0.86.el7_4.2, +5 more
    fixed: vendor fix RHSA-2021:0702
  • Red Hat Enterprise Linux Workstation (v. 7) grub2 2.02-0.87.el7_9.2, grub2-pc 2.02-0.87.el7_9.2, grub2-tools 2.02-0.87.el7_9.2, grub2-common 2.02-0.87.el7_9.2, grub2-efi-x64 2.02-0.87.el7_9.2, grub2-efi-ia32 2.02-0.87.el7_9.2, +5 more Red Hat Enterprise Linux Workstation Optional (v. 7) grub2-ppc-modules 2.02-0.87.el7_9.2, grub2-ppc64-modules 2.02-0.87.el7_9.2, grub2-efi-x64-cdboot 2.02-0.87.el7_9.2, grub2-efi-ia32-cdboot 2.02-0.87.el7_9.2, grub2-ppc64le-modules 2.02-0.87.el7_9.2, grub2-efi-aa64-modules 2.02-0.87.el7_9.2
    fixed: vendor fix RHSA-2021:0699
  • Red Hat Enterprise Linux 7 shim, mokutil, shim-unsigned, shim-unsigned-x64, shim-unsigned-ia32
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-21-336-06 updated cvss 8.2

Hitachi Energy APM Edge

  • Hitachi Energy APM Edge 3.0, 2.0, 1.0
    affected: vendor fix, mitigation “Physically protect process control systems from direct access by unauthorized personnel.” search.abb.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • n/a grub2

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.