CVE-2022-50145

Host hang via concurrent DMA descriptor race

Published Jun 18, 2025 · Updated Aug 5, 2026

A data race in the sf-pdma DMA driver in affected Linux kernels allows local users to hang the host via concurrent DMA transfers. Concurrent device_prep_dma_memcpy() calls overwrite the channel descriptor, so sf_pdma_tx_status can follow a descriptor that another thread freed or replaced. The sf-pdma driver must be present and parallel DMA clients must share a channel; the documented result is a kernel oops or system hang.

CVSS severity7.8
High
EPSS probability0.18%
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 sf-pdma DMA driver in affected Linux kernels allows local users to hang the host via concurrent DMA transfers. Concurrent device_prep_dma_memcpy() calls overwrite the channel descriptor, so sf_pdma_tx_status can follow a descriptor that another thread freed or replaced. The sf-pdma driver must be present and parallel DMA clients must share a channel; the documented result is a kernel oops or system hang.

The record

CVE
CVE-2022-50145
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record 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=5.5
  2. Affected versionversion=6973886ad58e6b4988813331abb76ae0b364a9c2 <4c7350b1dd8a192af844de32fc99b9e34c876fda
  3. Affected versionversion=6973886ad58e6b4988813331abb76ae0b364a9c2 <5ab2782c944e324008ef5d658f2494a9f0e3c5ac
  4. Affected versionversion=6973886ad58e6b4988813331abb76ae0b364a9c2 <a93b3f1e11971a91b6441b6d47488f4492cc113f
  5. Affected versionversion=6973886ad58e6b4988813331abb76ae0b364a9c2 <b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc
  6. Affected versionversion=6973886ad58e6b4988813331abb76ae0b364a9c2 <b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.5; version=6973886ad58e6b4988813331abb76ae0b364a9c2 <4c7350b1dd8a192af844de32fc99b9e34c876fda; version=6973886ad58e6b4988813331abb76ae0b364a9c2 <5ab2782c944e324008ef5d658f2494a9f0e3c5ac; version=6973886ad58e6b4988813331abb76ae0b364a9c2 <a93b3f1e11971a91b6441b6d47488f4492cc113f; version=6973886ad58e6b4988813331abb76ae0b364a9c2 <b2cc5c465c2cb8ab697c3fd6583c614e3f6cfbcc; version=6973886ad58e6b4988813331abb76ae0b364a9c2 <b9b4992f897be9b0b9e3a3b956cab6b75ccc3f11

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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