CVE-2025-39872: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: hsr: hold rcu and dev lock for hsr_get_port_ndev hsr_get_port_ndev calls hsr_for_each_port, which need to hold rcu lock. On the other hand, before return the port device, we need to hold the device reference to avoid UaF in the caller function.

Affected products

• Linux Linux Kernel: from 6.14, before 6.16.8 (fixed in 6.16.8); version 6.17 only

Published 2025-09-23. Last modified 2026-07-30.