CVE-2026-93170

DMA descriptor corruption via premature transfer restart

Published Sep 17, 2026 · Updated Sep 18, 2026

Race condition in the Linux kernel's xilinx_dma driver allows local users to corrupt DMA descriptors during queued transfers. The AXIDMA and MCDMA handlers set chan->idle and call start_transfer() after moving completed descriptors, without first ensuring active_list is empty. Exploitation requires local low-privileged access and multiple active descriptors; resulting premature transfers can corrupt descriptors or miss completions.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel's xilinx_dma driver allows local users to corrupt DMA descriptors during queued transfers. The AXIDMA and MCDMA handlers set chan->idle and call start_transfer() after moving completed descriptors, without first ensuring active_list is empty. Exploitation requires local low-privileged access and multiple active descriptors; resulting premature transfers can corrupt descriptors or miss completions.

The record

CVE
CVE-2026-93170
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=4.7
  2. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <0b6d055edb55ecadadf54e930c2b4fab76fa9a5a
  3. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <425630e9eea1f9f8912b8c6abf01e0dab1e27917
  4. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <5459e02707b27a964ae72e028d3ff72a3b687c4a
  5. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <7f4b989d7d87381927b98d64492f8dcf979f57ab
  6. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <c27d16fd2358b2fc3e1ffaca03afd11dc28630ea
  7. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <c3e943490ced0b9ad475844eda7661f6a9bcfb4a
  8. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <ec927657524be4438447944a58173c7baf7f2384
  9. Affected versionversion=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <fdaf297ab275c6efecac5e87669c31bc89b74297

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.7; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <0b6d055edb55ecadadf54e930c2b4fab76fa9a5a; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <425630e9eea1f9f8912b8c6abf01e0dab1e27917; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <5459e02707b27a964ae72e028d3ff72a3b687c4a; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <7f4b989d7d87381927b98d64492f8dcf979f57ab; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <c27d16fd2358b2fc3e1ffaca03afd11dc28630ea; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <c3e943490ced0b9ad475844eda7661f6a9bcfb4a; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <ec927657524be4438447944a58173c7baf7f2384; version=c0bba3a99f0709c24c2c7ada7cb098966b1d791f <fdaf297ab275c6efecac5e87669c31bc89b74297

Published CVSS scores

7.8GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.6Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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