---
id: CVE-2026-109976
title: A flaw was found in the clevis PKCS#11 pin
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.…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-787
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:17:36.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109976'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-109976'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2550375'
    label: secalert@redhat.com
tags:
  - nvd
ingestedAt: '2026-10-13T13:27:04.020Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.