---
id: CVE-2025-38372
title: 'RDMA/mlx5: Fix unsafe xarray access in implicit ODP handling'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  RDMA/mlx5: Fix unsafe xarray access in implicit ODP handling

  __xa_store() and __xa_erase() were used without holding the proper lock,
  which led to a lockdep warning du…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7cc8f681f6d4ae4478ae0f60485fc768f2b450da <
    9d2ef890e49963b768d4fe5a33029aacd9f6b93f
  - >-
    Linux >= d3d930411ce390e532470194296658a960887773 <
    ebebffb47c78f63ba7e4fbde393e44af38b7625d
  - >-
    Linux >= d3d930411ce390e532470194296658a960887773 <
    2c6b640ea08bff1a192bf87fa45246ff1e40767c
  - Linux a306dfff6b76aafa264ad33874a8992a8d5858b7
  - Linux edfb65dbb9ffd3102f3ff4dd21316158e56f1976
  - Linux >= 6.12.13 < 6.12.37
  - Linux >= 6.6.160 < 6.7
  - Linux >= 6.13.2 < 6.14
  - Linux 6.14
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:49:46.422571Z'
published: '2025-07-25'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:37:02.465Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-38372'
references:
  - url: 'https://git.kernel.org/stable/c/9d2ef890e49963b768d4fe5a33029aacd9f6b93f'
  - url: 'https://git.kernel.org/stable/c/ebebffb47c78f63ba7e4fbde393e44af38b7625d'
  - url: 'https://git.kernel.org/stable/c/2c6b640ea08bff1a192bf87fa45246ff1e40767c'
tags:
  - cve.org
epss: 0.00222
epssPercentile: 0.12632
ingestedAt: '2026-10-15T22:48:25.504Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

RDMA/mlx5: Fix unsafe xarray access in implicit ODP handling

__xa_store() and __xa_erase() were used without holding the proper lock,
which led to a lockdep warning due to unsafe RCU usage.  This patch
replaces them with xa_store() and xa_erase(), which perform the necessary
locking internally.

  =============================
  WARNING: suspicious RCPU usage
  6.14.0-rc7_for_upstream_debug_2025_03_18_15_01 #1 Not tainted
  -----------------------------
  ./include/linux/xarray.h:1211 suspicious rcu_dereference_protected() usage!

  other info that might help us debug this:

  rcu_scheduler_active = 2, debug_locks = 1
  3 locks held by kworker/u136:0/219:
      at: process_one_work+0xbe4/0x15f0
      process_one_work+0x75c/0x15f0
      pagefault_mr+0x9a5/0x1390 [mlx5_ib]

  stack backtrace:
  CPU: 14 UID: 0 PID: 219 Comm: kworker/u136:0 Not tainted
  6.14.0-rc7_for_upstream_debug_2025_03_18_15_01 #1
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS
  rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
  Workqueue: mlx5_ib_page_fault mlx5_ib_eqe_pf_action [mlx5_ib]
  Call Trace:
   dump_stack_lvl+0xa8/0xc0
   lockdep_rcu_suspicious+0x1e6/0x260
   xas_create+0xb8a/0xee0
   xas_store+0x73/0x14c0
   __xa_store+0x13c/0x220
   ? xa_store_range+0x390/0x390
   ? spin_bug+0x1d0/0x1d0
   pagefault_mr+0xcb5/0x1390 [mlx5_ib]
   ? _raw_spin_unlock+0x1f/0x30
   mlx5_ib_eqe_pf_action+0x3be/0x2620 [mlx5_ib]
   ? lockdep_hardirqs_on_prepare+0x400/0x400
   ? mlx5_ib_invalidate_range+0xcb0/0xcb0 [mlx5_ib]
   process_one_work+0x7db/0x15f0
   ? pwq_dec_nr_in_flight+0xda0/0xda0
   ? assign_work+0x168/0x240
   worker_thread+0x57d/0xcd0
   ? rescuer_thread+0xc40/0xc40
   kthread+0x3b3/0x800
   ? kthread_is_per_cpu+0xb0/0xb0
   ? lock_downgrade+0x680/0x680
   ? do_raw_spin_lock+0x12d/0x270
   ? spin_bug+0x1d0/0x1d0
   ? finish_task_switch.isra.0+0x284/0x9e0
   ? lockdep_hardirqs_on_prepare+0x284/0x400
   ? kthread_is_per_cpu+0xb0/0xb0
   ret_from_fork+0x2d/0x70
   ? kthread_is_per_cpu+0xb0/0xb0
   ret_from_fork_asm+0x11/0x20

## Affected

- `Linux >= 7cc8f681f6d4ae4478ae0f60485fc768f2b450da < 9d2ef890e49963b768d4fe5a33029aacd9f6b93f`
- `Linux >= d3d930411ce390e532470194296658a960887773 < ebebffb47c78f63ba7e4fbde393e44af38b7625d`
- `Linux >= d3d930411ce390e532470194296658a960887773 < 2c6b640ea08bff1a192bf87fa45246ff1e40767c`
- `Linux a306dfff6b76aafa264ad33874a8992a8d5858b7`
- `Linux edfb65dbb9ffd3102f3ff4dd21316158e56f1976`
- `Linux >= 6.12.13 < 6.12.37`
- `Linux >= 6.6.160 < 6.7`
- `Linux >= 6.13.2 < 6.14`
- `Linux 6.14`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.