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 3.1

4.3CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-25)

CWE

CWE-345

Published

2022-08-24

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• cryptsetup_project:cryptsetup

References

• https://access.redhat.com/security/cve/CVE-2021-4122
• https://bugzilla.redhat.com/show_bug.cgi?id=2031859
• https://bugzilla.redhat.com/show_bug.cgi?id=2032401
• https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356c
• https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes

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