Bug 2435647 (CVE-2025-71186) - CVE-2025-71186 kernel: dmaengine: stm32: dmamux: fix device leak on route allocation
Summary: CVE-2025-71186 kernel: dmaengine: stm32: dmamux: fix device leak on route all...
Keywords:
Status: NEW
Alias: CVE-2025-71186
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-31 12:01 UTC by OSIDB Bzimport
Modified: 2026-02-02 10:59 UTC (History)
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Description OSIDB Bzimport 2026-01-31 12:01:42 UTC 
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.
Comment 1 Alexander B 2026-02-02 10:55:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026013118-CVE-2025-71186-48f2@gregkh/T
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