CVE-2025-21814 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ptp: Ensure info->enable callback is always set

The ioctl and sysfs handlers unconditionally call the ->enable callback. Not all drivers implement that callback leading to NULL dereferences. Example of affected drivers: ptp_s390.c ptp_vclock.c and ptp_mock.c.

Instead use a dummy callback if no better was specified by the driver.

Reference

https://git.kernel.org/stable/c/5d1041c76de656f9f8d5a192218039a9acf9bd00 https://git.kernel.org/stable/c/755caf4ee1c615ee5717862e427124370f46b1f3 https://git.kernel.org/stable/c/81846070cba17125a866e8023c01d3465b153339 https://git.kernel.org/stable/c/8441aea46445252df5d2eed6deb6d5246fc24002 https://git.kernel.org/stable/c/fd53aa40e65f518453115b6f56183b0c201db26b