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Vulnerability DatabaseCVE-2025-21888
CVE-2025-21888:
Linux Kernel vulnerability analysis and mitigation
Overview
In the Linux kernel, a vulnerability (CVE-2025-21888) has been identified in the RDMA/mlx5 component affecting Memory regions (MR) of type DM (device memory). The issue was discovered and reported on March 27, 2025 (NVD).
Technical details
The vulnerability occurs in the _mlx5ibderegmr() -> mlx5freeprivdescs() flow, where the code incorrectly takes the wrong branch when handling Memory regions of type DM. This results in an attempt to call dmaunmap_single() on a DMA address that is not mapped, leading to a system WARN condition (NVD).
Impact
When triggered, this vulnerability results in a system WARN condition and potential system instability. The issue specifically affects the memory management functionality of RDMA/mlx5 device drivers in the Linux kernel (NVD).
Mitigation and workarounds
The issue has been resolved by properly accounting for the DM type and ensuring the correct branch is selected in mlx5freepriv_descs(). The fix involves correcting the logic path for handling Memory regions of type DM during deregistration operations (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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