CVE-2026-72006
- Source
- https://cve.org/CVERecord?id=CVE-2026-72006
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72006.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72006
- Downstream
- Published
- 2026-08-15T05:51:36Z
- Modified
- 2026-08-18T03:31:00Z
- Summary
- net/mlx5: free mlx5_st_idx_data on final dealloc
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72006.json" }- References
-
- https://git.kernel.org/stable/c/262da8b6ea03d01ee7ed01ad309e4c89941f6b14
- https://git.kernel.org/stable/c/6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75
- https://git.kernel.org/stable/c/df6134b527a88b3e65ba6ae5073664af091d5fd2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72006.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72006
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git