CVE-2025-38726
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-04

Last updated on: 2025-11-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: net: ftgmac100: fix potential NULL pointer access in ftgmac100_phy_disconnect After the call to phy_disconnect() netdev->phydev is reset to NULL. So fixed_phy_unregister() would be called with a NULL pointer as argument. Therefore cache the phy_device before this call.
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Meta Information
Published
2025-09-04
Last Modified
2025-11-25
Generated
2026-06-16
AI Q&A
2025-09-04
EPSS Evaluated
2026-06-14
NVD
CVE-2025-38726
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
linux linux_kernel From 5.15.160 (inc) to 5.16 (inc)
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 in the Linux kernel involves a potential NULL pointer access in the ftgmac100 network driver. Specifically, after calling phy_disconnect(), the netdev->phydev pointer is reset to NULL, but the function fixed_phy_unregister() is then called with this NULL pointer, which can lead to a NULL pointer dereference. The fix involves caching the phy_device before calling fixed_phy_unregister() to avoid this issue.

Impact Analysis

The vulnerability can cause a NULL pointer dereference in the Linux kernel's network driver, which may lead to system instability or crashes. This could impact the reliability and availability of systems running the affected Linux kernel version.

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