Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: phy: micrel: always set shared->phydev for LAN8814 Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP clock gets actually set, otherwise the function will return before setting it. This is an issue as shared->phydev is unconditionally being used when IRQ is being handled, especially in lan8814_gpio_process_cap and since it was not set it will cause a NULL pointer exception and crash the kernel. So, simply always set shared->phydev to avoid the NULL pointer exception.
References
- https://git.kernel.org/stable/c/399d10934740ae8cdaa4e3245f7c5f6c332da844
- https://git.kernel.org/stable/c/b093b06826b836c2824858669db080c190c04715
- https://git.kernel.org/stable/c/da1ef8e9eb5d4a12bec32d11636e521e7d529b9e
FAQ
What is CVE-2025-40239?
CVE-2025-40239 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: net: phy: micrel: always set shared->phydev for LAN8814 Currently, during the LAN8814 PTP probe shared->phydev is only set if PTP ...
How severe is CVE-2025-40239?
CVSS scoring is not yet available for CVE-2025-40239. Check NVD for updates.
Is there a patch for CVE-2025-40239?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.