MediumFix available
clevis — security advisory
A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon crashes when an AF_UNIX client connects to the data socket without a bound address, due to an integer underflow in the getpeername result handling. This causes a denial of service, preventing LUKS disk decryption from completing during boot.
- Products
- clevis
- Affected versions
- 19-2, 19-3, 19-4, 19-5, 19-6, 20-1, 22-1, 23-1, 24-1
- Fixed versions
- 24-1
- CVEs
- CVE-2026-109976
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 14:29 UTC · Revision 1
Source evidence
A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon crashes when an AF_UNIX client connects to the data socket without a bound address, due to an integer underflow in the getpeername result handling. This causes a denial of service, preventing LUKS disk decryption from completing during boot.
osv:DEBIAN-CVE-2026-109976
clevis
Fixed versions: Not specified
clevis
Fixed versions: Not specified
clevis
Fixed versions: 24-1
Complete source record
{
"id": "fffa8a21eb7c5e88b4e132199a1f6696ea44c6e02cc20835b2bc5933db9bfe73",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-109976",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-109976",
"summary": "A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon crashes when an AF_UNIX client connects to the data socket without a bound address, due to an integer underflow in the getpeername result handling. This causes a denial of service, preventing LUKS disk decryption from completing during boot.",
"evidence": "osv:DEBIAN-CVE-2026-109976",
"products": [
{
"name": {
"value": "clevis",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "19-2",
"evidence": "/affected/0/versions"
},
{
"value": "19-3",
"evidence": "/affected/0/versions"
},
{
"value": "19-4",
"evidence": "/affected/0/versions"
},
{
"value": "19-5",
"evidence": "/affected/0/versions"
},
{
"value": "19-6",
"evidence": "/affected/0/versions"
},
{
"value": "20-1",
"evidence": "/affected/0/versions"
},
{
"value": "22-1",
"evidence": "/affected/0/versions"
},
{
"value": "23-1",
"evidence": "/affected/0/versions"
},
{
"value": "24-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "clevis",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "20-1",
"evidence": "/affected/1/versions"
},
{
"value": "22-1",
"evidence": "/affected/1/versions"
},
{
"value": "23-1",
"evidence": "/affected/1/versions"
},
{
"value": "24-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "clevis",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "24-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "20-1",
"evidence": "/affected/2/versions"
},
{
"value": "22-1",
"evidence": "/affected/2/versions"
},
{
"value": "23-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-109976",
"aliases": [
"DEBIAN-CVE-2026-109976"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "clevis",
"purl": "pkg:deb/debian/clevis?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"19-2",
"19-3",
"19-4",
"19-5",
"19-6",
"20-1",
"22-1",
"23-1",
"24-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109976.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "clevis",
"purl": "pkg:deb/debian/clevis?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"20-1",
"22-1",
"23-1",
"24-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109976.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "24-1"
}
]
}
],
"package": {
"name": "clevis",
"purl": "pkg:deb/debian/clevis?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"20-1",
"22-1",
"23-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-109976.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-31T09:47:24.665486390Z",
"provider": "osv",
"upstream": [
"CVE-2026-109976"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-109976"
]
},
"related_cves": [
{
"value": "CVE-2026-109976",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 485727,
"published_at": "2026-10-13T13:17:29.563+00:00"
}