CVE-2025-71186
Modified Modified - Updated After Analysis
BaseFortify

Publication date: 2026-01-31

Last updated on: 2026-06-02

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: stm32: dmamux: fix device leak on route allocation Make sure to drop the reference taken when looking up the DMA mux platform device during route allocation. Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference.
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Meta Information
Published
2026-01-31
Last Modified
2026-06-02
Generated
2026-06-16
AI Q&A
2026-01-31
EPSS Evaluated
2026-06-15
NVD
CVE-2025-71186
Affected Vendors & Products
Showing 15 associated CPEs
Vendor Product Version / Range
linux linux_kernel 4.15
linux linux_kernel From 6.13 (inc) to 6.18.7 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.11 (inc) to 5.15.199 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.162 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.122 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.67 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 4.15.1 (inc) to 5.10.249 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
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Executive Summary

This vulnerability involves a device reference leak in the Linux kernel's DMA engine for the stm32 dmamux component. Specifically, during route allocation, a reference to the DMA mux platform device was not properly dropped, which could lead to a device leak. Holding a reference to the device does not prevent its driver data from being removed, so keeping the reference was unnecessary and caused the issue.

Impact Analysis

The vulnerability can lead to resource leaks in the system, specifically device reference leaks in the DMA mux component. This could potentially cause system instability or unexpected behavior due to improper management of device references during route allocation.

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