---
id: CVE-2022-49133
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdkfd: svm range restore work deadlock when process exit

  kfd_process_notifier_release flush svm_range_restore_work
  which calls svm_range_list_lock_and_flush_work …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/amdkfd: svm range restore work deadlock when process exit

  kfd_process_notifier_release flush svm_range_restore_work
  which calls svm_range_list_lock_and_flush_work …
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.14, < 5.16.20'
  - 'linux_kernel >= 5.17, < 5.17.3'
patched:
  - linux_kernel 5.17.3
published: '2025-02-26'
updated: '2026-08-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-49133'
references:
  - url: 'https://git.kernel.org/stable/c/6225bb3a88d22594aacea2485dc28ca12d596721'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/858822905f4bf44100d63c5e22e263109976f7cb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a6be83086e91891081e0589e4b4645bf4643e897'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00265
epssPercentile: 0.18731
ingestedAt: '2026-08-13T00:57:22.667Z'
---

## Overview

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

drm/amdkfd: svm range restore work deadlock when process exit

kfd_process_notifier_release flush svm_range_restore_work
which calls svm_range_list_lock_and_flush_work to flush deferred_list
work, but if deferred_list work mmput release the last user, it will
call exit_mmap -> notifier_release, it is deadlock with below backtrace.

Move flush svm_range_restore_work to kfd_process_wq_release to avoid
deadlock. Then svm_range_restore_work take task->mm ref to avoid mm is
gone while validating and mapping ranges to GPU.

Workqueue: events svm_range_deferred_list_work [amdgpu]
Call Trace:
 wait_for_completion+0x94/0x100
 __flush_work+0x12a/0x1e0
 __cancel_work_timer+0x10e/0x190
 cancel_delayed_work_sync+0x13/0x20
 kfd_process_notifier_release+0x98/0x2a0 [amdgpu]
 __mmu_notifier_release+0x74/0x1f0
 exit_mmap+0x170/0x200
 mmput+0x5d/0x130
 svm_range_deferred_list_work+0x104/0x230 [amdgpu]
 process_one_work+0x220/0x3c0

## Affected

- `linux_kernel >= 5.14, < 5.16.20`
- `linux_kernel >= 5.17, < 5.17.3`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.17.3`