What’s Vulnerable › Vulnerabilities

CVE-2025-71186: dmaengine: stm32: dmamux: fix device leak on route allocation

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-31 · updated 2026-10-15
• Weakness: CWE-401

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.

Affected products

• Linux kernel: from 4.15.1 before 5.10.249; from 5.11 before 5.15.199; from 5.16 before 6.1.162; from 6.2 before 6.6.122; from 6.7 before 6.12.67; from 6.13 before 6.18.7 — fixed in 5.10.249, 5.15.199, 6.1.162, 6.12.67, 6.18.7, 6.6.122

How to fix

Upgrade to a fixed version: Linux kernel 5.10.249, 5.15.199, 6.1.162, 6.12.67. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1a179ac01ff3993ab97e33cc77c316ed7415cda1
• https://git.kernel.org/stable/c/1dda2a32303df0091896b01a9d09070d61fa344c
• https://git.kernel.org/stable/c/2fb10259d4efb4367787b5ae9c94192e8a91c648
• https://git.kernel.org/stable/c/3b42020e6790a5e19b36c187ed5b488a5716f97f
• https://git.kernel.org/stable/c/3ef52d31cce8ba816739085a61efe07b63c6cf27
• https://git.kernel.org/stable/c/6393da54dcb3488c080a183c4182ddec71ba8d7f
• https://git.kernel.org/stable/c/dd6e4943889fb354efa3f700e42739da9bddb6ef
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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