Insufficient verification of data authenticity in cryptsetup
Priority LOW 20CWE-345Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-345.
Summary
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.
Why it matters now
EPSS 0.00319 25th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | cryptsetup | Fixed in cryptsetup 2.4.3, cryptsetup 2.3.7 | — | No fix listed | CNA |
- cryptsetup Vendor— Affected Fixed in cryptsetup 2.4.3, cryptsetup 2.3.7 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cryptsetup_project:cryptsetup:*:*:*:*:*:*:*:* | before 2.3.7; 2.4.0 to before 2.4.3 | Vulnerable | Cryptsetup Project |
- cpe:2.3:a:cryptsetup_project:cryptsetup:*:*:*:*:*:*:*:* Versions before 2.3.7; 2.4.0 to before 2.4.3 Vulnerable ·Cryptsetup Project
Remediation
Red Hat 1 advisory
- RHSA-2022:0370 Released 2022-02-01 · Red Hat rating Moderatecryptsetup security update
- Red Hat Enterprise Linux AppStream (v. 8) cryptsetup-devel-2.3.3-4.el8_5.1
- Red Hat Enterprise Linux BaseOS (v. 8) cryptsetup-2.3.3-4.el8_5.1, cryptsetup-libs-2.3.3-4.el8_5.1, cryptsetup-reencrypt-2.3.3-4.el8_5.1 +2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2022:0370 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2022:0370 |
Not affected: 2 products
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-4122
- 2026-10-03 Alias added: GHSA-8fgw-wvm8-3x84
References
More Cryptsetup Project Cryptsetup vulnerabilities
- TI-2020-11250 Out-of-bounds write in cryptsetup CVSS 3.1HIGH 7.8
- TI-2016-03855 The Debian initrd script for the cryptsetup package 2:1.7.3-2 and earlier allows… CVSS 3.0MEDIUM 6.8
Sources
- CVE-2021-4122 · CVE Program
- CVE-2021-4122 · NVD
- FIRST EPSS
- GHSA-8fgw-wvm8-3x84 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-4122 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences