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CVE-2022-49133

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

Medium5.5EPSS 0.27%
Published
Updated
Reserved
Assigned by
Linux

Description

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

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 18 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-49133, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.27% · top 81% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • Linux · Linux

    • affected 8a7c184a16d73ab25360e0f5997f82306ff5d5a2 – < a6be83086e91891081e0589e4b4645bf4643e897
    • affected 8a7c184a16d73ab25360e0f5997f82306ff5d5a2 – < 858822905f4bf44100d63c5e22e263109976f7cb
    • affected 8a7c184a16d73ab25360e0f5997f82306ff5d5a2 – < 6225bb3a88d22594aacea2485dc28ca12d596721

  • Linux · Linux

    • affected 5.14
    • unaffected < 5.14
    • unaffected 5.16.20 – ≤ 5.16.*
    • unaffected 5.17.3 – ≤ 5.17.*
    • unaffected 5.18 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .