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Vulnerability DatabaseCVE-2025-40066
CVE-2025-40066:
Linux Debian vulnerability analysis and mitigation
Overview
CVE-2025-40066 is a vulnerability discovered in the Linux kernel affecting the WiFi subsystem, specifically the mt76 driver for mt7996 devices. The vulnerability was disclosed on October 28, 2025, and involves a potential NULL pointer dereference in the mt7996macstainitlink routine (NVD).
Technical details
The vulnerability exists in the mt7996macstaaddlinks function of the mt76 WiFi driver. The issue occurs due to improper pointer validation before calling mt7996macstainitlink(), which could lead to a NULL pointer dereference. The fix involves moving the phy pointer check before running the mt7996macstainitlink() function in the mt7996macstaaddlinks routine (Ubuntu).
Impact
A NULL pointer dereference vulnerability could potentially lead to system crashes or denial of service conditions in affected Linux systems using the mt7996 WiFi driver (NVD).
Mitigation and workarounds
The vulnerability has been fixed in the Linux kernel. Users should update their systems to the patched version when available. The fix involves a code modification to ensure proper pointer validation before function calls (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Debian vulnerabilities:
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