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CVE-2025-71188: dmaengine: lpc18xx-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 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: lpc18xx-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 4.3.1 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/1e47d80f6720f0224efd19bcf081d39637569c10
• https://git.kernel.org/stable/c/3d396ebfb3049a2b5fac51d2c967db5114b685e8
• https://git.kernel.org/stable/c/499ddae78c4baa9b94df76b2d2eb6b150d15377f
• https://git.kernel.org/stable/c/992eb8055a6e5dbb808672d20d68e60d5a89b12b
• https://git.kernel.org/stable/c/9fba97baa520c9446df51a64708daf27c5a7ed32
• https://git.kernel.org/stable/c/adef147a8d8c3d767abf88ad2c381ffab2993086
• https://git.kernel.org/stable/c/d4d63059dee7e7cae0c4d9a532ed558bc90efb55
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html

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