A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon logs LUKS disk encryption passphrases in plaintext to a log file. The log file is created without restrictive permissions, making it world-readable under the default process umask. A local attacker can read the log file to obtain the LUKS passphrase.

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Fixes

Solution

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Workaround

Configure the clevis-luks-pkcs11-askpass systemd service with a restrictive UMask by creating a service override using systemctl edit. Setting UMask to 0077 prevents the log file from being readable by non-root users. Additionally, remove any existing log files under /run/systemd/clevis-pkcs11-*.log after each boot, as they may already contain passphrases from previous unlocks. This workaround only covers the systemd service path. The dracut initramfs code path is not covered by this mitigation.

History

Wed, 14 Oct 2026 13:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon logs LUKS disk encryption passphrases in plaintext to a log file. The log file is created without restrictive permissions, making it world-readable under the default process umask. A local attacker can read the log file to obtain the LUKS passphrase.
Title Clevis: clevis: pkcs#11 luks passphrase logged in plaintext to world-readable file
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Weaknesses CWE-532
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-14T12:50:33.873Z

Reserved: 2026-10-13T11:32:07.004Z

Link: CVE-2026-109968

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T13:17:27.837

Modified: 2026-10-14T13:17:27.837

Link: CVE-2026-109968

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses