Linux Kernel Vulnerability in E810 Firmware Affecting Low Latency Tx Timestamps

CVE-2025-39854

What is CVE-2025-39854?

A vulnerability in the Linux kernel affects the E810 firmware, specifically during handling of low latency Tx timestamps. The ice_ll_ts_intr() function fails to verify whether the Tx timestamp tracking structure (ice_ptp_tx) is properly initialized prior to accessing it. This oversight could lead to NULL dereference or use-after-free issues, potentially causing system instability. The flaw has been addressed by ensuring that the accessibility checks for the tracker occur only when it is confirmed as initialized, thus preventing dangerous memory access and maintaining system integrity.

References