CVE-2022-50393

Local service interruption via lock-dependent SDMA iteration

Published Sep 18, 2025 · Updated Sep 18, 2025

Improper locking in the Linux kernel amdgpu driver allows local users to interrupt service during an SDMA page-table update. amdgpu_vm_sdma_update uses a lock-dependent dma_resv fence iterator even when the update path runs without the reservation lock, causing dma_resv_iter_next to warn. Reachability requires an AMD GPU using amdgpu and an SVM range invalidation; published evidence establishes availability disruption, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel amdgpu driver allows local users to interrupt service during an SDMA page-table update. amdgpu_vm_sdma_update uses a lock-dependent dma_resv fence iterator even when the update path runs without the reservation lock, causing dma_resv_iter_next to warn. Reachability requires an AMD GPU using amdgpu and an SVM range invalidation; published evidence establishes availability disruption, not data access or modification.

The record

CVE
CVE-2022-50393
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3913f0179ba366f7d7d160c506ce00de1602bbc4
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4ff3d517cebe8a29b9f3c302b5292bb1ce291e00
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b892c57a3a04c8de247ab9ee08a0a8cf53290e19

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3913f0179ba366f7d7d160c506ce00de1602bbc4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4ff3d517cebe8a29b9f3c302b5292bb1ce291e00; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b892c57a3a04c8de247ab9ee08a0a8cf53290e19

Published CVSS scores

5.5CISA ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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