CVE-2025-40239

Linux Kernel 6.10-6.12.55, 6.13-6.17.5, >=6.18 - Denial of Service via LAN8814 PTP Probe NULL Pointer Dereference

Title source: llm
STIX 2.1

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.

Scores

EPSS 0.0017
EPSS Percentile 6.9%

Details

Status published
Products (10)
linux/Kernel 6.10.0 - 6.12.56linux
linux/Kernel 6.13.0 - 6.17.6linux
Linux/Linux < 6.10
Linux/Linux 6.10
Linux/Linux 6.12.56 - 6.12.*
Linux/Linux 6.17.6 - 6.17.*
Linux/Linux 6.18
Linux/Linux b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746 - 399d10934740ae8cdaa4e3245f7c5f6c332da844
Linux/Linux b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746 - b093b06826b836c2824858669db080c190c04715
Linux/Linux b3f1a08fcf0dd58d99b14b9f8fbd1929f188b746 - da1ef8e9eb5d4a12bec32d11636e521e7d529b9e
Published Dec 04, 2025
Tracked Since Feb 18, 2026