Description
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: free mlx5_st_idx_data on final dealloc
Workloads that repeatedly allocate and release mkeys carrying TPH steering-tag hints (e.g. churning RDMA MRs) leak one struct mlx5_st_idx_data per cycle; kmemleak flags it as unreferenced and the kmalloc slab grows over time.
When the last reference to an ST table entry is dropped, mlx5_st_dealloc_index() removed the entry from idx_xa but the backing mlx5_st_idx_data allocation was never freed.
Free idx_data after the xa_erase() so the lifetime of the bookkeeping struct matches the lifetime of the ST entry it tracks.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 888a7776f4fb04c19bec70c737c61c2f383c6b1e, < 262da8b6ea03d01ee7ed01ad309e4c89941f6b14; >= 888a7776f4fb04c19bec70c737c61c2f383c6b1e, < 6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75; >= 888a7776f4fb04c19bec70c737c61c2f383c6b1e, < df6134b527a88b3e65ba6ae5073664af091d5fd2 |
| Linux | Linux | 6.17 |
References
Timeline
- Published
- Aug 15, 2026
- Last modified
- Aug 17, 2026
- NVD status
- Received