CVE-2022-50362

Host hang via concurrent DMA descriptor race

Published Sep 17, 2025 · Updated Sep 17, 2025

A data race in the HiSilicon DMA driver in affected Linux kernels allows local users to hang or oops the host via concurrent transfers. Each thread replaces the channel descriptor after device_issue_pending, so the interrupt handler can act on a different descriptor and leave the completed transfer and callback unhandled. Reaching the flaw requires local access to concurrent operations on the same HiSilicon DMA channel; the established consequence is a kernel oops or host hang.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A data race in the HiSilicon DMA driver in affected Linux kernels allows local users to hang or oops the host via concurrent transfers. Each thread replaces the channel descriptor after device_issue_pending, so the interrupt handler can act on a different descriptor and leave the completed transfer and callback unhandled. Reaching the flaw requires local access to concurrent operations on the same HiSilicon DMA channel; the established consequence is a kernel oops or host hang.

The record

CVE
CVE-2022-50362
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=5.6
  2. Affected versionversion=e9f08b65250d73ab70e79e194813f52b8d306784 <2cbb95883c990d0002a77e13d3278913ab26ad79
  3. Affected versionversion=e9f08b65250d73ab70e79e194813f52b8d306784 <7cb9b20941e1fb20d22d0a2f460a3d4fa417274c
  4. Affected versionversion=e9f08b65250d73ab70e79e194813f52b8d306784 <af12e209a9d559394d35875ba0e6c80407605888
  5. Affected versionversion=e9f08b65250d73ab70e79e194813f52b8d306784 <d4a8ec5cc7ff5d442bd49a44f26d74b2021ba4c8
  6. Affected versionversion=e9f08b65250d73ab70e79e194813f52b8d306784 <f4cee0b385cd0348e071d4d80c4c13cfe547c70d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=e9f08b65250d73ab70e79e194813f52b8d306784 <2cbb95883c990d0002a77e13d3278913ab26ad79; version=e9f08b65250d73ab70e79e194813f52b8d306784 <7cb9b20941e1fb20d22d0a2f460a3d4fa417274c; version=e9f08b65250d73ab70e79e194813f52b8d306784 <af12e209a9d559394d35875ba0e6c80407605888; version=e9f08b65250d73ab70e79e194813f52b8d306784 <d4a8ec5cc7ff5d442bd49a44f26d74b2021ba4c8; version=e9f08b65250d73ab70e79e194813f52b8d306784 <f4cee0b385cd0348e071d4d80c4c13cfe547c70d

Published CVSS scores

5.5CISACVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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