Medium
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
- 11-2, 12-1ubuntu1, 12-1ubuntu2, 12-1ubuntu2.1, 12-1ubuntu2.2, 12-1ubuntu2.3, 16-2, 18-1, 18-1ubuntu1, 18-1ubuntu1.1, 19-3, 19-6, 19-6build1, 19-6build2, 20-1, 20-1build1, 20-1ubuntu0.24.04.1, 20-1ubuntu1, 20-1ubuntu2, 23-1, 23-1build1, 8-1, 8-1ubuntu0.1, 8-1ubuntu0.2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-109976
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:54 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:UBUNTU-CVE-2026-109976
clevis
Fixed versions: Not specified
clevis
Fixed versions: Not specified
clevis
Fixed versions: Not specified
clevis
Fixed versions: Not specified
clevis
Fixed versions: Not specified
clevis
Fixed versions: Not specified
Complete source record
{
"id": "58f8a56784beebca3552a220f27b99fa0a4d75357ec18895c5512e586f4c706e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-109976",
"method": "structured",
"payload": {
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"title": "UBUNTU-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:UBUNTU-CVE-2026-109976",
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"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
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],
"modified": "2026-10-17T12:59:51.903674707Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-109976",
"https://www.cve.org/CVERecord?id=CVE-2026-109976",
"https://access.redhat.com/security/cve/CVE-2026-109976",
"https://bugzilla.redhat.com/show_bug.cgi?id=2550375"
]
},
"related_cves": [
{
"value": "CVE-2026-109976",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 359829,
"published_at": "2026-10-13T13:17:00+00:00"
}