CVE-2026-109976 PUBLISHED

Clevis: clevis: integer underflow in pkcs#11 data socket handler crashes daemon on unbound client connection

Assigner: redhat
Reserved: 13.10.2026 Published: 13.10.2026 Updated: 13.10.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS Score: 4.7

Product Status

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Versions Default: affected
Vendor Red Hat
Product Red Hat Enterprise Linux 7
Versions Default: unaffected
Vendor Red Hat
Product Red Hat Enterprise Linux 8
Versions Default: unaffected
Vendor Red Hat
Product Red Hat Enterprise Linux 9
Versions Default: affected
Vendor Red Hat
Product Red Hat OpenShift Container Platform 4
Versions Default: unaffected
Vendor Red Hat
Product Red Hat OpenShift Container Platform 4
Versions Default: unaffected

Workarounds

No additional end-user mitigation is needed. Under the default systemd configuration, the data socket is only accessible by root, preventing unprivileged users from triggering the crash.

References

Problem Types

  • Out-of-bounds Write CWE