CVE-2026-68134

kernel: ptp: ptp_s390: Add missing facility check

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 10, 2026

Updated · October 30, 2026

Description

A flaw was found in the ptp_s390 module of the Linux kernel. This vulnerability allows the physical clock to be registered even when the necessary facility 28 is not installed or PTFF QPT is unavailable. This improper registration could lead to unexpected system behavior or a denial of service (DoS) condition.

Statement

This issue affects s390 PTP clock (ptp_s390). Physical clock registered without checking facility 28 / PTFF availability. s390 systems without required facility only.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-280 · Improper Handling of Insufficient Permissions or Privileges