CVE catalog

CVE-2021-4122

cryptsetup: CVE-2021-4122

Severity: Medium · CVSS 5.9CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Published: Jan 1, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.32% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	cryptsetup	sid	`2:2.8.8-1`	fixed
Debian	cryptsetup	forky	`2:2.8.8-1`	fixed
Debian	cryptsetup	trixie	`2:2.7.5-2`	fixed
Debian	cryptsetup	bookworm	`2:2.6.1-4~deb12u2`	fixed
Cpe	cryptsetup	Not reported	`2.4.3`	fixed
Alpine	cryptsetup	3.12	`2.3.7-r0`	fixed
Alpine	cryptsetup	3.13	`2.3.7-r0`	fixed
Alpine	cryptsetup	3.14	`2.3.7-r0`	fixed
Alpine	cryptsetup	3.15	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.16	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.17	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.18	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.19	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.20	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.21	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.22	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.23	`2.4.3-r0`	fixed
Alpine	cryptsetup	3.24	`2.4.3-r0`	fixed
Ubuntu	cryptsetup	20.04	`2:2.2.0-3ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.1-1ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-1ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-2ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2.2`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2.3`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2.4`	fixed
Ubuntu	cryptsetup	22.04	`2:2.3.6-0ubuntu1`	vulnerable
Ubuntu	cryptsetup	22.04	`2:2.4.2-1ubuntu3`	vulnerable
Ubuntu	cryptsetup	22.04	`2:2.4.2-1ubuntu4`	vulnerable
Ubuntu	cryptsetup	22.04	`2:2.4.3-1ubuntu1`	fixed
Ubuntu	cryptsetup	20.04	`2:2.2.0-3ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.1-1ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-1ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-2ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu1`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2.2`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2.3`	vulnerable
Ubuntu	cryptsetup	20.04	`2:2.2.2-3ubuntu2.4`	fixed
Suse	varnish	package hub 15 sp4	`7.1.0-bp154.2.3.1`	fixed
Opensuse	varnish	leap 15.4	`7.1.0-bp154.2.3.1`	fixed
Opensuse	cryptsetup	leap 15.3	`2.3.7-150300.3.5.1`	fixed
Suse	cryptsetup	linux enterprise module for basesystem 15 sp3	`2.3.7-150300.3.5.1`	fixed
Suse	cryptsetup	linux enterprise micro 5.1	`2.3.7-150300.3.5.1`	fixed
Opensuse	cryptsetup	tumbleweed	`2.4.3-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	cryptsetup	source	sid	`2:2.4.3-1`	not yet assigned	Not reported	[1003686]
Debian	cryptsetup	source	forky	`2:2.4.3-1`	not yet assigned	Not reported	[1003686]
Debian	cryptsetup	source	trixie	`2:2.4.3-1`	not yet assigned	Not reported	[1003686]
Debian	cryptsetup	source	bookworm	`2:2.4.3-1`	not yet assigned	Not reported	[1003686]
Cpe	cryptsetup	cpe	Not reported	`2.4.3`	Not reported	NVD-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.12	`2.3.7-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.13	`2.3.7-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.14	`2.3.7-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.15	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.16	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.17	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.18	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.19	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.20	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.21	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.22	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.23	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Alpine	cryptsetup	apk	3.24	`2.4.3-r0`	Not reported	ALPINE-CVE-2021-4122	Not reported
Ubuntu	cryptsetup	deb	20.04	`2:2.2.2-3ubuntu2.4`	Not reported	UBUNTU-CVE-2021-4122	Not reported
Ubuntu	cryptsetup	deb	22.04	`2:2.4.3-1ubuntu1`	Not reported	UBUNTU-CVE-2021-4122	Not reported
Ubuntu	cryptsetup	deb	20.04	`2:2.2.2-3ubuntu2.4`	Not reported	USN-5286-1	Not reported
Suse	varnish	rpm	package hub 15 sp4	`7.1.0-bp154.2.3.1`	Not reported	OPENSUSE-SU-2022:0144-1	Not reported
Opensuse	varnish	rpm	leap 15.4	`7.1.0-bp154.2.3.1`	Not reported	OPENSUSE-SU-2022:0144-1	Not reported
Opensuse	cryptsetup	rpm	leap 15.3	`2.3.7-150300.3.5.1`	Not reported	OPENSUSE-SU-2022:0144-1	Not reported
Suse	cryptsetup	rpm	linux enterprise module for basesystem 15 sp3	`2.3.7-150300.3.5.1`	Not reported	SUSE-SU-2022:0144-1	Not reported
Suse	cryptsetup	rpm	linux enterprise micro 5.1	`2.3.7-150300.3.5.1`	Not reported	SUSE-SU-2022:0144-1	Not reported
Opensuse	cryptsetup	rpm	tumbleweed	`2.4.3-1.1`	Not reported	OPENSUSE-SU-2024:11754-1	Not reported

[Debian bug #1003686]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[cryptsetup]Unknown
Details (2)
- 2:2.6.1-4~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[cryptsetup-bin]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[cryptsetup-initramfs]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · all · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · all · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[cryptsetup-run]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · all · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · all · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[cryptsetup-ssh]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[cryptsetup-suspend]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[libcryptsetup12]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
[libcryptsetup-dev]Unknown
Source package: [cryptsetup]
Details (2)
- 2:2.6.1-4~deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm
- 2:2.6.1-4~deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:2.4.3-1
  dsa · cryptsetup · debian · bookworm

[openSUSE Tumbleweed]

[cryptsetup]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · x86_64 · tumbleweed
  Fixed · Fixed: 2.4.3-1.1
  dsa · cryptsetup · opensuse · tumbleweed
[cryptsetup-doc]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · noarch · tumbleweed
  Unknown · Fixed: 2.4.3-1.1
  Version impact unknown
  dsa · cryptsetup · opensuse · tumbleweed
[cryptsetup-lang]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · noarch · tumbleweed
  Unknown · Fixed: 2.4.3-1.1
  Version impact unknown
  dsa · cryptsetup · opensuse · tumbleweed
[cryptsetup-ssh]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.3-1.1
  Version impact unknown
  dsa · cryptsetup · opensuse · tumbleweed
[libcryptsetup12]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.3-1.1
  Version impact unknown
  dsa · cryptsetup · opensuse · tumbleweed
[libcryptsetup12-32bit]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.3-1.1
  Version impact unknown
  dsa · cryptsetup · opensuse · tumbleweed
[libcryptsetup-devel]Unknown
Source package: [cryptsetup]
Details (1)
- 2.8.7-1.2 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.3-1.1
  Version impact unknown
  dsa · cryptsetup · opensuse · tumbleweed

Observed: Oct 23, 2026, 6:02:44 PM UTC

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]