Linux Kernel Vulnerability Affecting PTP Driver Functionality
CVE-2025-21822
What is CVE-2025-21822?
In the Linux kernel, a vulnerability exists within the PTP driver related to the handling of driver data during the vmclock_ptp_register() process. If the registration fails, the subsequent cleanup procedure, vmclock_remove(), attempts to access the driver state without proper initialization, as dev_get_drvdata() is called before the driver data is set. This flaw can lead to undefined behavior. To address the issue, the assignment of driver data should occur earlier in the code flow to ensure stability and reliability in clock management. For further technical details, refer to the kernel's official documentation and source code.
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Affected Version(s)
Linux 20503272422693d793b84f88bf23fe4e955d3a33 < 6dbd8b91a065d1d8001446a28e72cd140f9acef0
Linux 20503272422693d793b84f88bf23fe4e955d3a33
Linux 6.13