CVE-2021-20225
MEDIUMGRUB2 < 2.06 - Heap-Based Buffer Overflow via Option Parser
Title source: llmDescription
A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
References (4)
Core 4
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1924696
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202104-05
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20220325-0001/
Scores
CVSS v3
6.7
EPSS
0.0007
EPSS Percentile
21.9%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (20)
fedoraproject/fedora
33
fedoraproject/fedora
34
gnu/grub2
< 2.06
netapp/ontap_select_deploy_administration_utility
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
... and 10 more
Published
Mar 03, 2021
Tracked Since
Feb 18, 2026