A flaw was found in the clevis PKCS#11 pin. The clevis-luks-pkcs11-askpin script writes the PKCS#11 token PIN in plaintext to a file without setting restrictive permissions. Under the default process umask, the file is world-readable. Additionally, the PIN file is not reliably cleaned up if the decryption script exits early, leaving the PIN accessible indefinitely.

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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 PIN file from being readable by non-root users. This workaround only covers the systemd service path. The dracut initramfs code path is not covered by this mitigation.

History

Wed, 14 Oct 2026 10:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in the clevis PKCS#11 pin. The clevis-luks-pkcs11-askpin script writes the PKCS#11 token PIN in plaintext to a file without setting restrictive permissions. Under the default process umask, the file is world-readable. Additionally, the PIN file is not reliably cleaned up if the decryption script exits early, leaving the PIN accessible indefinitely.
Title Clevis: clevis: pkcs#11 token pin written to world-readable file
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Weaknesses CWE-538
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': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/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: 2026-10-14T14:12:15.165Z

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

Link: CVE-2026-109970

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-14T10:17:52.137

Modified: 2026-10-14T10:17:52.137

Link: CVE-2026-109970

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses