CVE Catalog

CVE-2026-72006

Low risk· EPSS 10%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.20%

10th percentile - higher than 10% of all known CVEs

Summary

In the Linux kernel's mlx5 driver, there is a memory leak when repeatedly allocating and freeing mkeys with TPH hints. After removing the entry from idx_xa, the mlx5_st_idx_data structure was never freed, causing the leak to grow.

Risk Assessment

Long-running systems with heavy MR allocation may exhaust memory and degrade performance.

Recommendation

Apply a kernel update that includes the fix to free idx_data after xa_erase().

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS