dmaengine: stm32: dmamux: fix device leak on route allocation

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Summary

CVECVE-2025-71186
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-31 12:16:03 UTC
Updated2026-06-02 14:16:39 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-401

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 3b42020e6790a5e19b36c187ed5b488a5716f97f git Not specified
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 6393da54dcb3488c080a183c4182ddec71ba8d7f git Not specified
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 1dda2a32303df0091896b01a9d09070d61fa344c git Not specified
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 1a179ac01ff3993ab97e33cc77c316ed7415cda1 git Not specified
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 2fb10259d4efb4367787b5ae9c94192e8a91c648 git Not specified
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 3ef52d31cce8ba816739085a61efe07b63c6cf27 git Not specified
CNA Linux Linux affected df7e762db5f6c8dbd9e480f1c9ef9851de346657 dd6e4943889fb354efa3f700e42739da9bddb6ef git Not specified
CNA Linux Linux affected 4.15 Not specified
CNA Linux Linux unaffected 4.15 semver Not specified
CNA Linux Linux unaffected 5.10.249 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.199 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.162 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.122 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.67 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.7 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified
ADP Siemens RUGGEDCOM RST2428P affected V4.0 custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1dda2a32303df0091896b01a9d09070d61fa344c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dd6e4943889fb354efa3f700e42739da9bddb6ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-253495.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/2fb10259d4efb4367787b5ae9c94192e8a91c648 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6393da54dcb3488c080a183c4182ddec71ba8d7f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3b42020e6790a5e19b36c187ed5b488a5716f97f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1a179ac01ff3993ab97e33cc77c316ed7415cda1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3ef52d31cce8ba816739085a61efe07b63c6cf27 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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