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Vulnerability DatabaseCVE-2025-39830
CVE-2025-39830:
Linux Kernel vulnerability analysis and mitigation
Overview
A memory leak vulnerability was identified in the Linux kernel, tracked as CVE-2025-39830. The issue was discovered in the net/mlx5 Hardware Steering (HWS) component, specifically in the hws_pool_buddy_init error path. The vulnerability was disclosed on September 16, 2025 (NVD).
Technical details
The vulnerability occurs in the buddy allocator cleanup process where the allocator structure itself is not properly freed in the error path of hws_pool_buddy_init(). This results in a memory leak condition that requires adding a missing kfree() call to properly release all allocated memory (NVD).
Impact
The memory leak could lead to gradual system resource depletion over time, potentially affecting system performance and stability in environments where the affected component is frequently used (Ubuntu).
Mitigation and workarounds
The issue has been resolved through patches in various Linux distributions. Ubuntu has marked this as fixed in several releases including 24.04 LTS noble and 22.04 LTS jammy, while some versions like 25.04 plucky remain vulnerable (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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