CVE-2025-39858: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: eth: mlx4: Fix IS_ERR() vs NULL check bug in mlx4_en_create_rx_ring Replace NULL check with IS_ERR() check after calling page_pool_create() since this function returns error pointers (ERR_PTR). Using NULL check could lead to invalid pointer dereference.

Affected products

• Linux Linux Kernel: from 6.15, before 6.16.6 (fixed in 6.16.6); version 6.17 only

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