# CVE-2026-109969: Clevis: clevis: no authentication on pkcs#11 af_unix sockets allows key injection under permissive umask

Status: published. Published: 2026-10-14. Updated: 2026-11-03.

A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon creates AF_UNIX sockets without explicit permission restrictions or peer credential verification. Under a permissive process umask, any local user can connect to the control socket and inject arbitrary device/key pairs, or connect to the data socket to receive LUKS passphrases.

## Remediation

- 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 ensures the sockets are only accessible by root, preventing unauthorized connections.

This workaround only covers the systemd service path. The dracut initramfs code path is not covered by this mitigation. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (clevis): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (clevis): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (clevis): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (clevis): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-8): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 4 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat OpenShift Container Platform 5 (openshift/ose-rhel-coreos-9): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 4.7 (medium); CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-02; percentile 2.79%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-306

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-109969 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2550361 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-109969; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-109969; retrieved 2026-11-03; source updated Not reported

Revision: 7c253d1067ea3fd3bb5da76927dd6efade8784f8378f7bd820ce6bde09ef5c0c

Canonical: https://y2.dev/cve/CVE-2026-109969

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