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CVE-2026-109976

CVE-2026-109976 · Clevis: clevis: integer underflow in pkcs#11 data socket handler crashes daemon on unbound client connection

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 4.7 · Medium · EPSS 0.1%

Published
Updated

Stack: system

Affected products and versions

  • red hat enterprise linux 10

    No fix published

  • red hat enterprise linux 7

    No fix published

  • red hat enterprise linux 8

    No fix published

  • red hat enterprise linux 9

    No fix published

  • red hat openshift container platform 4

    No fix published

  • clevis Debian:12

    Versions
    • 19-2
    • 19-3
    • 19-4
    • 19-5
    • 19-6
    • 20-1
    • 22-1
    • 23-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Debian:13

    Versions
    • 20-1
    • 22-1
    • 23-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Debian:14

    Versions
    • 20-1
    • 22-1
    • 23-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Ubuntu:18.04:LTS

    Versions
    • 8-1
    • 8-1ubuntu0.1
    • 8-1ubuntu0.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Ubuntu:20.04:LTS

    Versions
    • 11-2
    • 12-1ubuntu1
    • 12-1ubuntu2
    • 12-1ubuntu2.1
    • 12-1ubuntu2.2
    • 12-1ubuntu2.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Ubuntu:22.04:LTS

    Versions
    • 16-2
    • 18-1
    • 18-1ubuntu1
    • 18-1ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Ubuntu:24.04:LTS

    Versions
    • 19-3
    • 19-6
    • 19-6build1
    • 19-6build2
    • 20-1
    • 20-1ubuntu0.24.04.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Ubuntu:26.10

    Versions
    • 20-1ubuntu2
    • 23-1
    • 23-1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • clevis Ubuntu:26.04:LTS

    Versions
    • 20-1
    • 20-1build1
    • 20-1ubuntu1
    • 20-1ubuntu2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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