MediumFix available
cryptsetup — security advisory
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.
- Products
- cryptsetup
- Affected versions
- Not specified
- Fixed versions
- 2.3.7-r0, 2.4.3-r0
- CVEs
- CVE-2021-4122
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:06 UTC · Revision 1
Source evidence
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.
osv:ALPINE-CVE-2021-4122
cryptsetup
Fixed versions: 2.3.7-r0
cryptsetup
Fixed versions: 2.3.7-r0
cryptsetup
Fixed versions: 2.3.7-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
cryptsetup
Fixed versions: 2.4.3-r0
Complete source record
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"url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-4122",
"method": "structured",
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"aliases": [
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],
"modified": "2026-10-23T17:17:56.213888725Z",
"provider": "osv",
"upstream": [
"CVE-2021-4122"
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"references": [
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"source_id": "core-osv",
"document_id": 415556,
"published_at": "2022-08-24T16:15:09.427+00:00"
}