CVE-2025-39855 ice: fix NULL access of tx->in_use in ice_ptp_ts_irq

In the Linux kernel, the following vulnerability has been resolved: ice: fix NULL access of tx-inuse in iceptptsirq The E810 device has support for a "low latency" firmware interface to access and read the Tx timestamps. This interface does not use the standard Tx timestamp logic, due to the...

CVE-2025-39855

Summary: CVE-2025-39855 concerns the Linux kernel ICE driver (notably the E810’s low-latency TX timestamp interface). The bug occurs in ice_ptp_ts_irq() where the Tx timestamp tracker ice_ptp_tx is used before being initialized, risking NULL dereference or use-after-free if a TX timestamp interru...