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CVE Record

CVE-2025-71189: dmaengine: dw: dmamux: fix OF node leak on route allocation failure

In the Linux kernel, the following vulnerability has been resolved: dmaengine: dw: dmamux: fix OF node leak on route allocation failure Make sure to drop the reference taken to the DMA master OF node also on late route allocation failures.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2025-71189 is a Linux kernel bug involving a reference leak in the DesignWare DMA multiplexer code when route allocation fails. The public record does not describe data theft, privilege escalation, or remote compromise. Treat it as a kernel maintenance issue unless your environment depends on affected DMA/Device Tree hardware paths.

Executive priority

Handle through normal kernel patch governance. Escalate only for embedded or industrial systems where vendor advisories confirm exposure, or where kernel updates are difficult and long-lived devices are involved.

Technical view

The fix ensures the DMA master OF node reference is released on late route allocation failures in dmaengine/dw/dmamux. Sources identify Linux kernel as affected and provide stable kernel commits. No CVSS, CWE, or detailed impact is published in the provided record.

Likely exposure

Exposure is most likely on systems running affected Linux kernels with the DesignWare DMA DMAMUX and OF/Device Tree path in use. General internet-facing exposure is not indicated by the sources. Embedded, industrial, or appliance kernels may need vendor confirmation, especially where Siemens advisories apply.

Exploitation context

CISA KEV is false in the provided data, and no cited source claims active exploitation. Public sources do not describe an exploit path. The issue appears tied to an error-handling path causing an OF node reference leak during DMA route allocation failure.

Researcher notes

Evidence is limited: no CVSS, CWE, exploitability analysis, or impact statement beyond the kernel fix description. Avoid assuming remote reachability or privilege impact. Focus review on commit diffs, affected kernel branch mapping, and vendor backport status.

Mitigation direction

  • Update to a kernel or vendor build containing the cited stable fixes.
  • Check Linux distribution advisories for backported fixes.
  • Review Siemens advisories if using affected Siemens products.
  • If no fix is listed, request vendor guidance before changing kernels.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and embedded systems.
  • Identify systems using DesignWare DMA DMAMUX and Device Tree configurations.
  • Compare installed kernels against cited stable commits or vendor advisories.
  • Document vendor status for Siemens-managed or Siemens-integrated products.
Prepared
Confidence
medium
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2025-71189 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
8Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux134d9c52fca26d2d199516e915da00f0cc6adc73, 134d9c52fca26d2d199516e915da00f0cc6adc73, 134d9c52fca26d2d199516e915da00f0cc6adc73, 134d9c52fca26d2d199516e915da00f0cc6adc73, 134d9c52fca26d2d199516e915da00f0cc6adc73unaffected
LinuxLinux5.19, 0, 6.1.162, 6.6.122, 6.12.67, 6.18.7, 6.19affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.