NULL Pointer Dereference Vulnerability in Linux Kernel Affecting E810 Devices

CVE-2025-39855

What is CVE-2025-39855?

A vulnerability in the Linux kernel affects E810 devices due to inadequate checks in the ice_ptp_ts_irq() function, which can lead to a NULL pointer dereference. This issue arises when the Tx timestamp interrupt interacts with driver reset logic, potentially resulting in use-after-free conditions. The bug occurs because the tracker might not be initialized prior to being accessed, leading to system instability. The fix ensures that checks on the tracker only occur if it is marked as initialized.

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