CVE-2025-39858 eth: mlx4: Fix IS_ERR() vs NULL check bug in mlx4_en_create_rx_ring
A bug in the mlx4 Ethernet driver causes a null pointer dereference, leading to a system crash or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-39858?
CVE-2025-39858 is a medium-severity vulnerability in Linux kernel, published on 19 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-476
Which versions are affected by CVE-2025-39858?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-39858?
Apply the vendor's patch.
Is CVE-2025-39858 being exploited?
There is no known exploitation of CVE-2025-39858 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-39858, DEBIAN-CVE-2025-39858, GHSA-x732-54q6-pv67, UBUNTU-CVE-2025-39858.