CVE-2025-39856 net: ethernet: ti: am65-cpsw-nuss: Fix null pointer dereference for ndev

What is CVE-2025-39856?

CVE-2025-39856 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:

net: ethernet: ti: am65-cpsw-nuss: Fix null pointer dereference for ndev

In the TX completion packet stage of TI SoCs with CPSW2G instance, which has single external ethernet port, ndev is accessed without being initialized if no TX packets have been processed. It results into null pointer dereference, causing kernel to crash. Fix this by having a check on the number of TX packets which have been processed.

Weakness: CWE-476

Which versions are affected by CVE-2025-39856?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-39856?

Apply the vendor's patch.

Is CVE-2025-39856 being exploited?

There is no known exploitation of CVE-2025-39856 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2025-39856, DEBIAN-CVE-2025-39856, GHSA-5m54-qph5-4wvp, UBUNTU-CVE-2025-39856.