CVE-2025-39853: Debian Linux

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: i40e: Fix potential invalid access when MAC list is empty list_first_entry() never returns NULL - if the list is empty, it still returns a pointer to an invalid object, leading to potential invalid memory access when dereferenced. Fix this by using list_first_entry_or_null instead of list_first_entry.

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 4.6, before 5.4.299 (fixed in 5.4.299); from 5.5, before 5.10.243 (fixed in 5.10.243); from 5.11, before 5.15.192 (fixed in 5.15.192); from 5.16, before 6.1.151 (fixed in 6.1.151); from 6.2, before 6.6.105 (fixed in 6.6.105); from 6.7, before 6.12.46 (fixed in 6.12.46); …

Published 2025-09-19. Last modified 2026-06-17.