CVE-2021-4122

It was found that a specially crafted LUKS header could trick cryptsetup into disabling encryption during the recovery of the device. An attacker with physical access to the medium, such as a flash disk, could use this flaw to force a user into permanently disabling the encryption layer of that medium.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.7 / Impact : 3.6

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2021-4122	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2031859	Permissions Required Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2032401	Issue Tracking Third Party Advisory
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356c	Patch Third Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes	Release Notes Vendor Advisory
https://access.redhat.com/security/cve/CVE-2021-4122	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2031859	Permissions Required Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2032401	Issue Tracking Third Party Advisory
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356c	Patch Third Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes	Release Notes Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cryptsetup_project:cryptsetup::::::::
	cpe:2.3:a:cryptsetup_project:cryptsetup::::::::

History

14 Oct 2026, 11:16

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-398330.html -

Information

Published : 2022-08-24 16:15

Updated : 2026-10-14 11:16

NVD link : CVE-2021-4122

Mitre link : CVE-2021-4122

CVE.ORG link : CVE-2021-4122

JSON object : View

Products Affected

cryptsetup_project

cryptsetup

CWE

CWE-345

Insufficient Verification of Data Authenticity

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