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Vulnerability DatabaseCVE-2025-40000
CVE-2025-40000:
Linux Debian vulnerability analysis and mitigation
Overview
A use-after-free vulnerability was discovered in the Linux kernel's rtw89 WiFi driver, specifically in the rtw89coretxkickoffandwait() function. The vulnerability was reported on October 15, 2025, and affects the wireless network functionality in the Linux kernel (Kernel NVD).
Technical details
The vulnerability occurs when rtw89coretxkickoffandwait() attempts to access skbdata that has already been freed. The issue stems from a race condition between the waiting and signaling sides of the completion process. The bug manifests in the following sequence: the waiting thread executes rtw89coretxkickoffandwait() and assigns the wait pointer, while the completing thread handles rtw89pcitxstatus() and rtw89coretxwaitcomplete() (Kernel NVD).
Impact
When exploited, this vulnerability can lead to a kernel crash due to accessing freed memory, potentially causing system instability or denial of service conditions (Kernel NVD).
Mitigation and workarounds
The vulnerability has been resolved through a patch that addresses the use-after-free condition in the rtw89coretxkickoffandwait() function. Users should update their Linux kernel to a version that includes this fix (Kernel NVD).
Additional resources
Source: This report was generated using AI
Related Linux Debian vulnerabilities:
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