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Vulnerability DatabaseCVE-2025-38641
CVE-2025-38641:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-38641 is a vulnerability discovered in the Linux kernel's Bluetooth subsystem, specifically in the btusb component. The vulnerability was disclosed on August 22, 2025, and affects the Linux kernel's handling of memory allocation in Bluetooth operations (NVD, Ubuntu).
Technical details
The vulnerability stems from improper handling of kmalloc failure in the btusb component of the Linux kernel. Specifically, the code fails to properly check the return value of kmalloc, which could lead to a potential NULL pointer dereference when memory allocation fails (NVD).
Impact
A NULL pointer dereference could potentially occur if memory allocation fails in the Bluetooth subsystem. This could lead to system instability or crashes in affected Linux systems (NVD).
Mitigation and workarounds
The vulnerability has been resolved through a patch that properly checks the return value of kmalloc and handles allocation failure appropriately. Most major Linux distributions have marked their current versions as not affected, indicating that patches have been widely implemented (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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