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CVE-2026-72006

net/mlx5: free mlx5_st_idx_data on final dealloc

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 888a7776f4fb04c19bec70c737c61c2f383c6b1e
Version < 262da8b6ea03d01ee7ed01ad309e4c89941f6b14
Status affected
Version 888a7776f4fb04c19bec70c737c61c2f383c6b1e
Version < 6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75
Status affected
Version 888a7776f4fb04c19bec70c737c61c2f383c6b1e
Version < df6134b527a88b3e65ba6ae5073664af091d5fd2
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.17
Status affected
Version 0
Version < 6.17
Status unaffected
Version <= 6.18.*
Version 6.18.40
Status unaffected
Version <= 7.1.*
Version 7.1.5
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.099
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/262da8b6ea03d01ee7ed01ad309e4c89941f6b14
https://git.kernel.org/stable/c/6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75
https://git.kernel.org/stable/c/df6134b527a88b3e65ba6ae5073664af091d5fd2