CVE-2026-68134

HighCVSS 7.3

Published: 10/08/2026(UTC)Updated: 17/08/2026(UTC)Translated: 10/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.13%

3th percentile - higher than 3% of all known CVEs

Summary

In the Linux kernel's PTP subsystem for s390, there is a missing facility check. The physical clock is registered without verifying that facility 28 is installed and that PTFF QAF confirms PTFF QPT availability. The fix adds the missing check.

Risk Assessment

This could lead to incorrect PTP functionality or system crash on s390 platforms, affecting time synchronization.

Recommendation

Apply the Linux kernel patch and reboot the system.

Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: ptp: ptp_s390: Add missing facility check Only register the physical clock when facility 28 is installed and PTFF QAF returns that PTFF QPT is available.