CVE-2025-38452: net: ethernet: rtsn: Fix a null pointer dereference in rtsn_probe()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-25 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: rtsn: Fix a null pointer dereference in rtsn_probe() Add check for the return value of rcar_gen4_ptp_alloc() to prevent potential null pointer dereference.

Affected products

Linux kernel: from 6.11 before 6.12.39; from 6.13 before 6.15.7; 6.16-rc1, 6.16-rc2, 6.16-rc3, 6.16-rc4, 6.16-rc5 — fixed in 6.12.39, 6.15.7

How to fix

Upgrade to a fixed version: Linux kernel 6.12.39, 6.15.7. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/95a234f6affbf51f06338383537ab80d637bb785
https://git.kernel.org/stable/c/9f260e16b297f8134c5f90bb5a20e805ff57e853
https://git.kernel.org/stable/c/d52eb4f0e0ca9a5213b8795abbeb11a325d9b22d

Get alerted when CVE-2025-38452 or the next vulnerability affects your stack