Vulnerability Details : CVE-2020-25632

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.
Vulnerability category: Memory Corruption
Published 2021-03-03 17:15:12
Updated 2022-05-13 20:51:19
Source Red Hat, Inc.
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2020-25632

Probability of exploitation activity in the next 30 days: 0.04%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-25632

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
7.2
 HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
 nvd@nist.gov
8.2
 HIGH CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
1.5
6.0
 nvd@nist.gov

CWE ids for CVE-2020-25632

  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by:
    • nvd@nist.gov (Primary)
    • secalert@redhat.com (Secondary)

References for CVE-2020-25632

Products affected by CVE-2020-25632

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