CVE-2025-39856
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-19

Last updated on: 2025-12-11

Assigner: kernel.org

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.
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Meta Information
Published
2025-09-19
Last Modified
2025-12-11
Generated
2026-06-16
AI Q&A
2025-09-19
EPSS Evaluated
2026-06-15
NVD
CVE-2025-39856
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.15 (inc) to 6.16.6 (exc)
linux linux_kernel 6.17
linux linux_kernel 6.17
linux linux_kernel 6.17
linux linux_kernel 6.17
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a null pointer dereference in the Linux kernel's ethernet driver for TI SoCs with the CPSW2G instance. Specifically, during the TX completion packet stage, the network device (ndev) is accessed without being initialized if no TX packets have been processed, which causes the kernel to crash. The issue is fixed by adding a check on the number of TX packets processed before accessing ndev.

Impact Analysis

This vulnerability can cause the Linux kernel to crash due to a null pointer dereference, leading to a denial of service on affected systems using the TI SoCs with CPSW2G ethernet instances. This can disrupt network connectivity and system availability.

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